掲載種別：研究論文（学術雑誌）  

添付ファイル： 2025_AM of UNS N07001.pdf

DOI： 10.1016/j.addma.2025.104690

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担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

添付ファイル： Near threshold single crystal (2024).pdf

DOI： 10.1016/j.engfracmech.2024.110411

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担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/978-3-031-63937-1_43

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担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

添付ファイル： 2024_Spreading dynamics with transient solidfication.pdf

DOI： 10.1016/j.ijheatmasstransfer.2024.125672

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

添付ファイル： 2024_Fatigue in DSW joints.pdf

DOI： 10.1111/ffe.14227

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担当区分：筆頭著者,　責任著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

Abstract

Evaluating the fatigue limit by measuring temperature changes via infrared thermography has attracted significant interest because of its potential for rapid assessments. However, the physical background and validity of this technique are not yet fully understood. In this study, notched specimens of a single crystal Ni‐base superalloy with different crystallographic orientations are subjected to cyclic loading to investigate crack initiation and temperature change. Local slip deformation is quantified using crystal plasticity finite element analyses. It is found from the experimental and analytical results that the distribution of the temperature change and the local slip deformation (a plastic shear strain on the most active slip system) are affected by the crystallographic orientation. However, the correlation between the plastic shear strain and the second harmonic amplitude, as well as the threshold values of these parameters for crack initiation, is independent of the crystallographic orientation.

DOI： 10.1111/ffe.14146

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/J.JFLUIDSTRUCTS.2023.103839

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier {BV}  

DOI： 10.1016/j.tafmec.2023.103795

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担当区分：筆頭著者,　責任著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

Abstract

Effects of rafted microstructure and its temperature dependency on fatigue crack propagation (FCP) in a single‐crystal Ni‐base superalloy are experimentally investigated. FCP tests are conducted at room temperature, 450°C, and 700°C for two types of pre‐rafted specimens, and their FCP behaviors are compared with that of a specimen with cuboidal γ′ precipitates. It is found in the experiments that there is no significant influence of rafted microstructures on FCP rate at room temperature, while a clear influence is pronounced at 450 and 700°C depending on the coarsening direction of rafted microstructures and the level of stress intensity factor range. The temperature dependency in the effect of rafted microstructure is discussed with special considerations on the microscopic FCP behavior affected by the morphology of γ′ precipitates, the coherency of the γ/γ′ interface, and temperature‐dependent slip characteristics of γ and γ′ phases.

DOI： 10.1111/ffe.13888

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その他リンク： https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ffe.13888

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijfatigue.2022.106952

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担当区分：責任著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.actamat.2022.118288

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier {BV}  

添付ファイル： 2022_Adhesion strength of paraffin droplet.pdf

DOI： 10.1016/j.rinp.2022.105310

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Science Impact, Ltd.  

In industrial applications, the coatings of materials are an important consideration, particularly the fracture and elastic-plastic mechanics of coating materials. This is an area of focus for researchers in the Inoue Sakaguchi Laboratory, Tokyo Institute of Technology, Japan, where
Associate Professor Motoki Sakaguchi and the team are investigating the stress and strain evolution during the solidification and adhesion process of coating materials. They are doing this by conducting model experiments using paraffin wax, which is enabling them to investigate the individual
effects of different experimental variables, including droplet materials, droplet temperature, droplet kinetic energy, substrate temperature and substrate roughness. In a current project, Sakaguchi is exploring the fundamental processes involved in residual stress development in thermal barrier
coatings during thermal spray procedures. For this, he and the team have developed a model experiment that allows them to simplify the thermal spray using a paraffin wax with a low melting point and, in doing so, the researchers can monitor and precisely record the deposition process of each
splat in the thermal spray. Sakaguchi hopes the research will help improve thermal spray technology and, ultimately, lead to improved, longer-lasting components and equipment in industrial products.

添付ファイル： 最終版.pdf

DOI： 10.21820/23987073.2022.1.39

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担当区分：責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.11351/jsaeronbun.52.899

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier {BV}  

DOI： 10.1016/j.msea.2021.140802

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担当区分：責任著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.surfcoat.2020.126145

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.scriptamat.2019.11.058

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担当区分：責任著者   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijfatigue.2019.105400

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担当区分：責任著者   掲載種別：論文集(書籍)内論文   出版者・発行元：Springer International Publishing  

DOI： 10.1007/978-3-030-51834-9_31

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1299/MEJ.20PREFACE02

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担当区分：責任著者   掲載種別：論文集(書籍)内論文   出版者・発行元：Springer International Publishing  

DOI： 10.1007/978-3-030-51834-9_34

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掲載種別：論文集(書籍)内論文   出版者・発行元：Springer International Publishing  

DOI： 10.1007/978-3-030-51834-9_19

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担当区分：筆頭著者,　責任著者   記述言語：日本語   出版者・発行元：高温低サイクル疲労標準（2019年改訂版）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.surfcoat.2019.06.067

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijfatigue.2019.02.003

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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記述言語：日本語   出版者・発行元：一般社団法人 日本機械学会  

DOI： 10.1299/jsmemm.2019.os0510

CiNii Research

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掲載種別：研究論文（学術雑誌）  

Web of Science

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1299/transjsme.18-00246

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1299/transjsme.17-00578

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.msea.2017.10.085

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1111/ffe.12723

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.msea.2018.03.090

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.surfcoat.2017.01.052

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 日本機械学会  

<p>In order to investigate the fundamental process of residual stress development in thermal barrier coating during thermal spray, a model experiment was conducted using a paraffin wax. Melted paraffin wax was dropped onto a circular substrate of type 430 stainless steel, and strain and temperature were measured on the back surface of substrate. The model experiment revealed that tensile quenching strain was developed during solidification and adhesion process and it was increased with the number of droplets. Development of the quenching strain and failure of paraffin coating were significantly influenced by substrate temperature. The lower substrate temperature caused the larger quenching strain, and facilitated cracking, delamination and debonding of the coating. Findings in a series of the model experiments showed some similarities to actual phenomena during thermal spray, and will provide a helpful suggestion to optimize various process parameters in thermal spray.</p>

DOI： 10.1299/transjsme.17-00377

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2472/jsms.66.731

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記述言語：日本語   出版者・発行元：公益社団法人 日本材料学会 高温強度部門委員会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：John Wiley & Sons, Inc.  

DOI： 10.1002/9781119075646.ch68

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jsamd.2016.08.009

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Materials Science, Japan  

DOI： 10.2472/jsms.64.120

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CiNii Books

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Japan Society of Mechanical Engineers  

Out-of-phase thermo-mechanical-fatigue (TMF) crack propagation tests were performed under load control condition by using compact tension specimen made of Ni-based single crystal superalloy, CMSX-4, and the effect of temperature range during loading cycle on crack propagation behavior was studied. The tests were conducted in the temperature range of 200-500°C and 200-800°C. For comparison, isothermal fatigue crack propagation test at 200°C was additionally performed. In the specimens tested under 200°C isothermal and 200-500°C out-of-phase conditions, the fatigue cracks propagated on {111} slip planes. In the specimen tested under 200-800°C out-of-phase condition, the crack propagated on the plane normal to the loading axis independently of crystallographic orientation, when the applied ΔK_I was lower than about 50 MPa・m^0.5, in spite of the fact that the maximum tensile loading during cyclic loads was applied at 200°C. When ΔK was larger than about 50 MPa・m^0.5, the crack propagated on {111} planes near the specimen side faces. These crack propagation rates in the specimens tested under 200-500°C out-of-phase and 200°C isothermal conditions could be evaluated by using the resolved shear stress intensity factor range. Crack propagation rate in the specimen tested under 200-800°C out-of phase could be evaluated by energy release rate for an anisotropy body. A reasonable interpretation was proposed on the transition of fracture mode between the sliding mode to opening mode, by an aid of the resolved shear stress intensity factor range.

DOI： 10.1299/transjsme.2014smm0294

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Elsevier Ltd  

DOI： 10.1016/j.proeng.2013.03.314

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Materials Science, Japan  

DOI： 10.2472/jsms.62.661

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Superalloys 2012  

DOI： 10.1002/9781118516430.ch47

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記述言語：英語   出版者・発行元：The Japan Society of Mechanical Engineers  

Micro Spark Coating (MSC) has been developed as a new functional coating process for Ni-based superalloys used in advanced gas turbines. In this study, some metallurgical and mechanical properties of a MSC layer made of a Co-based wear resisting alloy (X40), and its influence on the high temperature fatigue properties of Ni-based superalloy, Alloy718, were investigated. Prior evaluation of the metallurgical and mechanical properties of the MSC layer that the cavity fraction of MSC layer significantly decreased during the thermal exposure period at 650°C associating with the generation of an oxide phase, progressive sintering and the subsequent increase in hardness and elastic modulus of MSC layer. However, at 480°C these changes were not significant even after 1000hrs exposure. It was found from the high temperature fatigue tests at 480°C and 650°C that the fatigue life of the specimen with MSC layer was almost comparable to that of bare Alloy718 specimen at 480°C, while at 650°C the life of the former was slightly longer than that of the latter. These results suggested that the MSC would have a potential to add a new function to Ni-based superalloy without a reduction in fatigue properties at elevated temperature.

DOI： 10.1299/jmmp.6.227

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掲載種別：研究論文（学術雑誌）   出版者・発行元：Superalloys 2012  

DOI： 10.1002/9781118516430.ch49

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.msea.2011.11.066

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掲載種別：研究論文（学術雑誌）  

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掲載種別：研究論文（学術雑誌）  

DOI： 10.4028/WWW.SCIENTIFIC.NET/AMR.278.375

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掲載種別：研究論文（学術雑誌）   出版者・発行元：The Japan Society of Mechanical Engineers  

DOI： 10.1299/kikaia.77.2041

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Friction Stir Welding (FSW) technique was proposed as a new repair technique for Ni-base superalloys. At first, a butt welding joint between of Al alloy 6063 and INCONEL 758 tried to be fabricated by a FSW technique. The optimized welding condition was also explored combining a wide varieties of welding parameters. In order to assure the conditions, the mechanical properties of the welded joint thus optimized were also evaluated.

DOI： 10.1299/jsmemecjo.2010.1.0_33

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s12666-010-0035-8

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 日本機械学会  

DOI： 10.1299/kikaia.76.364

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CiNii Books

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 日本機械学会  

DOI： 10.1299/kikaia.76.370

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CiNii Books

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掲載種別：研究論文（学術雑誌）  

DOI： 10.4028/WWW.SCIENTIFIC.NET/MSF.631-632.91

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Japan Society of Mechanical Engineers  

The behavior of fatigue cracks which propagated at some representative areas in the friction stir welded joint of aluminum alloy, AA6063-T5, was studied at both room temperature (RT) and 200°C. The experimental results showed that the fatigue crack propagation (FCP) rates were significantly different depending on the crack propagating area. The test temperature also affected the FCP rates remarkably. In all cases, the FCP rates in the weldment were higher than those in the parent metal. The difference could not be reasonably interpreted only from mechanical point of view in which the crack closure behavior was taken into account. Furthermore, the non-uniform distribution of hardness had insignificant effect on FCP rates. This study found that the microstructural inhomogeneity played more essential role in FCP behavior of FSW.

DOI： 10.1299/jmmp.4.840

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Japan Society of Mechanical Engineers  

Local area fatigue crack propagation resistance of a retired gas turbine vane made of a Ni-based superalloy which had been operating for about 20000 h. in a 1100 °C level land-based gas turbine, was experimentally evaluated. Here, special efforts were made to build up a new testing apparatus to assess the fatigue crack propagation resistance, using the miniature size specimens extracted from the vane. The miniature specimens were extracted from the leading and the trailing edges, respectively. It was shown that the fatigue crack grew associating with the rate significantly higher at the trailing than at the leading edge part. It was also indicated that the crack propagation rates in the miniature specimen were generally higher than those in the standard size specimen. Furthermore, it was also shown that an application of a simple reheat treatment was effective to recover the crack propagation resistance for the post service vane.

DOI： 10.1299/jmmp.4.131

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Indentation test was carried out to measure mechanical properties (especially elastic modulus) of 8 wt.% Y_2O_3 partially stabilized ZrO_2 (YSZ) top coat used for Thermal barrier coatings (TBCs). The top coat was fabricated by air plasma spraying (APS) method. The APS coatings have very characteristic microstructure that consists of ceramic splats and inter-splat pores. Focusing on the intrinsic splat-structure on the mechanical behavior of APSed YSZ TBCs, quasi-splat structure specimens were also specified for the comparison. Special discussions were made on the effect of inter-splat pore on the elastic modulus evaluated by the indentation method.

DOI： 10.1299/jsmemecjo.2008.6.0_331

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

Web of Science

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijfatigue.2007.01.044

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Japan Society of Mechanical Engineers  

The high temperature strengths of the dissimilar friction welded superalloys joint between the cast polycrystalline Mar-M247 and the forged IN718 alloys have been investigated under low cycle and thermo-mechanical fatigue loadings, in comparison with those of the base metals. The experiments showed that the lives of the dissimilar joints were significantly influenced by the test conditions and loading modes. Not only the lives themselves but also the failure positions and mechanisms were sensitive to the loading mode. The fracture behaviors depending on the loading modes and test conditions were discussed, based on the macroscopic elastic follow-up mechanism and the microstructural inhomogeneity in the friction weld joint.

DOI： 10.1299/jmmp.2.1508

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記述言語：英語   出版者・発行元：The Japan Society of Mechanical Engineers  

Effect of MCrAlY bond coat alloy systems on thermal fatigue failure of thermal barrier coatings (TBCs) was investigated, where the TBC specimen consisted of Ni-based superalloy IN738LC substrate, bond coat, and 8 wt.% Y₂O₃-stabilized ZrO₂ (YSZ) top coat. The top coat was fabricated by EB-PVD method with 250 μm in thickness. Three kinds of MCrAlY alloys were studied as the bond coat material. Employing the originally developed test equipment, thermal fatigue tests were carried out, by applying thermal cycles between 400 and 950°C in air. Special attention was paid not only to the failure life of the TBC specimen, but also the underlying failure mechanisms. The experimental results clearly demonstrated that the effect of MCrAlY bond coat alloys on the thermal fatigue life was very significant. Some discussions were made on the experimental results based on the measurements of mechanical and metallurgical properties of the bond coat alloys: i.e., elastic stiffness, thermal expansion coefficient and high temperature oxidation resistance.

DOI： 10.1299/jmmp.2.854

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1361/cp2007epri0783

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掲載種別：研究論文（学術雑誌）  

DOI： 10.4028/WWW.SCIENTIFIC.NET/KEM.353-358.491

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Materials Science, Japan  

DOI： 10.2472/jsms.56.121

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掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijfatigue.2006.12.018

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

DOI： 10.1299/jsmemecjo.2006.1.0_943

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

DOI： 10.1299/jsmezairiki.2006.0_285

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人日本機械学会  

DOI： 10.1299/jsmea.49.345

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掲載種別：研究論文（学術雑誌）  

DOI： 10.2472/jsms.55.309

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掲載種別：研究論文（学術雑誌）  

DOI： 10.2472/jsms.54.122

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Thermal cycle damage evolution in a thermal barrier coating (TBC) specimen was studied, where the specimen was fabricated by an electron beam physical vapor deposition (EB-PVD) process. Special attention was paid to get basic understandings on the effect of top coat microstructure which may play an important role in the thermal cycle damage evolution and the durability of TBCs.

DOI： 10.1299/jsmemecjo.2005.6.0_259

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掲載種別：研究論文（学術雑誌）  

DOI： 10.2355/ISIJINTERNATIONAL.45.248

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

DOI： 10.1299/jsmezairiki.2004.0_409

CiNii Books

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掲載種別：研究論文（学術雑誌）  

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掲載種別：研究論文（学術雑誌）  

DOI： 10.2320/MATERTRANS.45.415

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

A new method employing coating technique has been proposed, in order to explore the methods to prevent the undesirable effect due to cellular microstructure on mechanical properties of CMSX-4. The experiments supported the validity of the method. The long term stability of the proposed coatings was also investigated.

DOI： 10.1299/jsmemecjo.2002.2.0_229

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記述言語：英語   出版者・発行元：一般社団法人日本機械学会  

Fatigue crack propagation of Ni-based superalloys which possessed large grains comparable to the specimen thickness was investigated at room temperature. Special focus was put on the interactions with grain boundaries. For the purpose, at first the effect of crystallographic orientation on the crack propagation rate was studied, using the single crystal superalloy specimens made of CMSX-4 with different primary and secondary orientations. Some discussions were also made on what mechanics and mechanisms controlled the behavior, on the basis of anisotropic fracture mechanics. Based on these findings, some significant interactions between the crack and grain boundaries were discussed specifying the IN939 polycrystalline superalloy specimen.

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

A new testing system has designed and developed to simulate an in-service condition of high temperature components with cooling holes under a thermal gradient condition. Using the new system, some experiments were carried out to assess the damage evolution, specifying a conventionally cast Ni-based superalloy specimen.

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Fatigue crack propagation of Ni-base superalloys was investigated at room temperature, using a miniature CT specimen of which the specimen thickness was comparable to the grain size. At first, effect of crystallographic orientation on the crack propagation was studied, using a single crystal superalloy, CMSX-4, with different primary and secondary orientations. Based on the results of the single crystal specimens, the crack propagation in the poly-crystal superalloy, IN939, was discussed, focusing on the effect of the grains orientation and a constraint of the grain boundary on the crack propagation rate and the propagation path.

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Fatigue crack propagation property of the post-service gas turbine vane made of a Ni-based superalloy, 1N939, was experimentally evaluated at room temperature and 850℃. Special efforts were made to build up a new testing apparatus to assess the fatigue crack propagation resistance, using the miniature compact tension (CT) specimen extracted from a leading edge and a trailing edge of the post-service vane and the as-cast IN939. It was experimentally found that fatigue crack propagation rates (FCGR) were higher in a larger thickness CT specimen (thickness 2.0mm) compared with those in the miniature CT specimens (thickness 0.5mm). It was also shown that FCGR in the post-service trailing edge were higher than in the leading edge and the as-cast specimen.

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

A Friction Stir Welding (FSW) technique was proposed as a new repairing technique for Ni-base superalloys. Dissimilar lap-joints composed of Ni-based superalloys and an Al alloy were fabricated, using an originally developed FSW machine. Mechanical properties and interface microstructures were systematically investigated, focusing on influences of many kinds of welding parameters, such as tool rotating speed, traverse speed and pin depth. A series of experiments showed that microstructure near the welding interface was significantly depending on the welding conditions. Under some specific conditions, lamellar structure and wavy interface were produced, in which intermetallic compounds were generated. Width of the intermetallic compounds was monotonically increased with the ratio between the tool rotational speed and the traverse speed, N/v. The joint strength was mainly governed by the pin depth. When fixing the pin depth, the joint strength showed the maximum value at a specific condition where the value of N/v was constant.

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

High temperature fatigue (HCF) properties of the A11oy718 superalloy specimens to aich a Co-based wear resisting alloy was coated by the Micro Spark Coating (MSC) method, were investigated at two elevated temperature, 480℃ and 650℃, respectively. It was revealed that the HCF life of coated specimen was slightly shorter than the life of bare specimen at 480℃. On the other hand, the HCF lives were longer at 650℃. The most of fracture surface were placed on the end of coating region in gage part at both temperatures. Form the elastic analysis using finite element method, the stress concentration had been occurred in the end of coating region. It was suggested that high temperature fatigue properties were influenced by two phenomena: one was the stress concentration that was based on the shape and mechanical properties of the MSC layer; and the other was a load transfer capability of the coated area, dependent on the test temperature and exposure time.

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

High temperature fatigue properties of the Inconel718 superalloy specimens to which a Co-based wear resisting alloy, Stellite31, was coated by the Micro Spark Coating (MSC) method, were investigated as well as the microstructural stability. It was shown that the microstructure of the coatings was almost stable even after the long term isothermal aging at 480℃ by 1000 hrs in air, while it changed significantly at 650℃. In the latter, increase in hardness was seen, associated with an evolution of oxide rich phases. The fatigue properties of the coated specimens revealed a complex behavior depending on the loading level and test temperature: in high cycle regime the coated specimens showed shorter fatigue lives than the Incone1718 substrate, while the former longer than the latter in low cycle regime. It was suggested that high temperature fatigue properties were influenced by two phenomena: one was the prior substrate surface characterization that might be affected by MSC process; and the other was a load transfer capability of the coated area, dependent on the test temperature and exposure time.

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

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記述言語：英語   出版者・発行元：一般社団法人日本機械学会  

Effect of MCrAlY bond coat alloy systems on thermal fatigue failure of thermal barrier coatings (TBCs) was investigated, where the TBC specimen consists of Ni-based superalloy IN738 substrate, bond coat, and 8 wt.% Y_2O_3-stabilized ZrO_2 (YSZ) topcoat. The top coat was fabricated by EB-PVD method with 250 μm in thickness. Three kinds of MCrAlY alloys were studied as the bond coat material. Employing the originally developed test equipment, the thermal fatigue tests were carried out, by applying thermal cycles between 400 and 950℃ in air. Special attention was paid not only to the failure lives themselves, but the underling failure mechanisms. The experimental results clearly demonstrated that the effect of MCrAlY bond coat alloys on the thermal fatigue life was very significant. Some mechanical and material backgrounds of these experimental results were discussed, based on the measurements of the mechanical and metallurgical properties of the bond coat: i.e., elastic stiffness, thermal expansion coefficient and high temperature oxidation resistance.

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

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記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

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記述言語：日本語   出版者・発行元：日本機械学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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記述言語：日本語   出版者・発行元：日本材料学会  

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開催年月日： 2026年3月

記述言語：日本語   会議種別：口頭発表（一般）  

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開催年月日： 2025年8月

記述言語：英語   会議種別：口頭発表（一般）  

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記述言語：英語   会議種別：口頭発表（一般）  

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記述言語：英語   会議種別：口頭発表（一般）  

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記述言語：英語   会議種別：口頭発表（一般）  

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記述言語：英語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：公開講演，セミナー，チュートリアル，講習，講義等  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語  

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記述言語：英語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：英語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：公開講演，セミナー，チュートリアル，講習，講義等  

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記述言語：日本語   会議種別：公開講演，セミナー，チュートリアル，講習，講義等  

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記述言語：日本語   会議種別：公開講演，セミナー，チュートリアル，講習，講義等  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：英語   会議種別：口頭発表（一般）  

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記述言語：英語   会議種別：ポスター発表  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：英語   会議種別：ポスター発表  

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記述言語：英語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（招待・特別）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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受賞国：日本国

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