Corrosion Resistance Evaluation of Structural MEDS Analysis Corrosion Resistance Evaluation of Structural MY. Murase 1 and H. Katayama 2 EDS Analysis 1 Research Center for Structural Materials, National Institute for Materials Science (NIMS) Y. Murase 1 and H. Katayama 2 Social implementation of high-strength steel materials is one of the important initiatives to promote 1 Research Center for Structural Materials, National Institute for Materials Science (NIMS) energy conservation and environmental load reduction. The high strength of steel materials can be achieved by some precisely arranged heterogeneous interfacial structures. On the other hand, in general, Social implementation of high-strength steel materials is one of the important initiatives to promote corrosion susceptibility increases as the strength of steels becomes higher, hence the development of energy conservation and environmental load reduction. The high strength of steel materials can be analysis techniques is urgently needed to evaluate the corrosion characteristics of heterogeneous achieved by some precisely arranged heterogeneous interfacial structures. On the other hand, in general, interfacial structures at the nano/micrometer scales. Here, we introduce a multimodal KFM-EBSD-EDS corrosion susceptibility increases as the strength of steels becomes higher, hence the development of analysis with the aim of obtaining design guidelines for high-strength steel materials with excellent analysis techniques is urgently needed to evaluate the corrosion characteristics of heterogeneous corrosion resistance. interfacial structures at the nano/micrometer scales. Here, we introduce a multimodal KFM-EBSD-EDS analysis with the aim of obtaining design guidelines for high-strength steel materials with excellent corrosion resistance. High Temperature Fatigue Properties of SiC/SiC Composites via Novel Production Route Using Sandwich Prepreg Sheets High Temperature Fatigue Properties of SiC/SiC Composites via Novel Production K. Shimoda and H. Kakisawa Route Using Sandwich Prepreg Sheets Research Center for Structural Materials, National Institute for Materials Science (NIMS) K. Shimoda and H. Kakisawa Composites consisting of a SiC ceramic matrix and reinforced SiC fibers (i.e., SiC/SiC composites) are attractive Research Center for Structural Materials, National Institute for Materials Science (NIMS) materials for next-generation nuclear, aircraft, and aerospace components. This is because of their low specific gravity, ability to retain their essential thermo-mechanical properties at high neutron fluxes, and ability to withstand Composites consisting of a SiC ceramic matrix and reinforced SiC fibers (i.e., SiC/SiC composites) are attractive high temperatures with good fracture resistance. The characteristics of this material are, first, for the fiber coating, materials for next-generation nuclear, aircraft, and aerospace components. This is because of their low specific hexagonal boron nitride (BN) was adapted, which is more thermally stable than the previous generation pyrolytic gravity, ability to retain their essential thermo-mechanical properties at high neutron fluxes, and ability to withstand carbon (PyC) interphase. The strength of SiC/SiC composites, especially in harsh environments, is mainly high temperatures with good fracture resistance. The characteristics of this material are, first, for the fiber coating, dependent on the integrity of the interphase between fiber and matrix. The interphase deflects the matrix-cracks, hexagonal boron nitride (BN) was adapted, which is more thermally stable than the previous generation pyrolytic leads to debonding between the fiber/matrix interface, and then increases the toughness and prevents the sudden carbon (PyC) interphase. The strength of SiC/SiC composites, especially in harsh environments, is mainly failure. However, the fiber/matrix interphase plays a critical role in determining the strength and fatigue properties dependent on the integrity of the interphase between fiber and matrix. The interphase deflects the matrix-cracks, of the SiC/SiC composites during oxidation at high temperatures. In general, two damage mechanisms should be leads to debonding between the fiber/matrix interface, and then increases the toughness and prevents the sudden involved in consideration when SiC/SiC composites are experiencing high-temperature fatigue. (i) Mechanical failure. However, the fiber/matrix interphase plays a critical role in determining the strength and fatigue properties damage due to the external physical applied forces such as matrix-cracks; (ii) Chemical damage due to oxygen of the SiC/SiC composites during oxidation at high temperatures. In general, two damage mechanisms should be transportation through mechanical damage such as degradation of the interphase and/or matrix-cracking. The involved in consideration when SiC/SiC composites are experiencing high-temperature fatigue. (i) Mechanical present study aimed to investigate the influence of oxidation during fatigue loading at 1200 °C under air damage due to the external physical applied forces such as matrix-cracks; (ii) Chemical damage due to oxygen atmosphere focused on the hex-BN interphase of the SiC/SiC composites. A tension-tension fatigue test under transportation through mechanical damage such as degradation of the interphase and/or matrix-cracking. The different fatigue load conditions was performed to investigate the fatigue deterioration of the SiC/SiC composites. present study aimed to investigate the influence of oxidation during fatigue loading at 1200 °C under air The differences in strength and fracture morphology during the static and fatigue loading based on microstructural atmosphere focused on the hex-BN interphase of the SiC/SiC composites. A tension-tension fatigue test under analysis were discussed, considering the effect of oxidation via matrix-cracks on BN interphase degradation. different fatigue load conditions was performed to investigate the fatigue deterioration of the SiC/SiC composites. The differences in strength and fracture morphology during the static and fatigue loading based on microstructural analysis were discussed, considering the effect of oxidation via matrix-cracks on BN interphase degradation. Poster Presentation ｜NIMS Award Symposium 2023 P3 ｜ Evaluationaterials by Materials by Multimodal KFultimodal KFPP33--1199 M-EBSD-PP33--1199 M-EBSD-PP33--2200 PP33--2200 67
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