Anisotropy of Uniaxial Yield Stress of Pearlitic Steel Caused by Compressive Deformation Anisotropy of Uniaxial Yield Stress of Pearlitic Steel Caused by Compressive Deformation R. Ueji 1, H. Somekawa 1, S. Emura 1 and T. Inoue 1 1 Research Center for Structural Materials, National Institute for Materials Science (NIMS) R. Ueji 1, H. Somekawa 1, S. Emura 1 and T. Inoue 1 1 Research Center for Structural Materials, National Institute for Materials Science (NIMS) Pearlite, which is a layered structure of ferrite and cementite in steel, is a fundamental microstructure in high-strength wire drawing materials and is important in industry. The deformed pearlite exhibits various Pearlite, which is a layered structure of ferrite and cementite in steel, is a fundamental microstructure in types of heterogeneous deformation microstructures that many researchers have studied to find the high-strength wire drawing materials and is important in industry. The deformed pearlite exhibits various relation between these and mechanical properties. One of the possible reasons for these heterogeneity types of heterogeneous deformation microstructures that many researchers have studied to find the lies on the lamellar structure as well as the hierarchical structure in pearlite consisting of nodules and relation between these and mechanical properties. One of the possible reasons for these heterogeneity colonies. This microstructural complexity prevents the understanding of the formation mechanism of lies on the lamellar structure as well as the hierarchical structure in pearlite consisting of nodules and the heterogeneous deformation in pearlite, and thus it can be expected that the systematical examination colonies. This microstructural complexity prevents the understanding of the formation mechanism of with the pearlitic steel deformed into various strains bring key knowledge to clarify the relation between the heterogeneous deformation in pearlite, and thus it can be expected that the systematical examination the plastic anisotropy and the deformation microstructure. In this study, we used a double compression with the pearlitic steel deformed into various strains bring key knowledge to clarify the relation between test method on pearlite steel (JIS-SUP12, Fe -0.55C -0.7Mn -0.76Cr -1.48Si [wt%]), and the anisotropy the plastic anisotropy and the deformation microstructure. In this study, we used a double compression of the yield stress was investigated in detail by systematically varying the strain and the axis of the test method on pearlite steel (JIS-SUP12, Fe -0.55C -0.7Mn -0.76Cr -1.48Si [wt%]), and the anisotropy second compression A slight first compression of about 10% causes plastic anisotropy in which the of the yield stress was investigated in detail by systematically varying the strain and the axis of the larger the interaxial angle with the first compression axis, the smaller the yield stress during the second second compression A slight first compression of about 10% causes plastic anisotropy in which the compression. It was found that the internal stress field exhibiting strong plastic anisotropy was evolved larger the interaxial angle with the first compression axis, the smaller the yield stress during the second mainly by the larger plastic strain locally in ferrite. compression. It was found that the internal stress field exhibiting strong plastic anisotropy was evolved mainly by the larger plastic strain locally in ferrite. PP11--1166 High-throughput Search for High-performance M Bulk Specimens High-throughput Search for High-performance M Bulk Specimens R. Yurishima 1, A. Ikeda 2 and T. Ikeda 1 1 Graduate School of Science and Engineering, University of Ibaraki R. Yurishima 1, A. Ikeda 2 and T. Ikeda 1 2 Research Center for Structural Materials, National Institute for Materials Science (NIMS) 1 Graduate School of Science and Engineering, University of Ibaraki 2 Research Center for Structural Materials, National Institute for Materials Science (NIMS) In recent years, there has been a growing interest in integrating information science, including machine learning, into materials development within the field of materials science. However, the In recent years, there has been a growing interest in integrating information science, including effectiveness of these methods depends on the availability of a substantial amount of experimental data. machine learning, into materials development within the field of materials science. However, the To meet this data requirement, the development of high-throughput experimental methods using effectiveness of these methods depends on the availability of a substantial amount of experimental data. composition-graded bulk samples is in progress. These samples are prepared through both the multiple To meet this data requirement, the development of high-throughput experimental methods using diffusion method and the Bridgman method, resulting in compositional gradients at various scales. composition-graded bulk samples is in progress. These samples are prepared through both the multiple These specimens facilitate the exploration of phase diagrams and the optimization of material diffusion method and the Bridgman method, resulting in compositional gradients at various scales. characteristics based on chemical composition. The multiple diffusion method involves sintering or These specimens facilitate the exploration of phase diagrams and the optimization of material welding various elemental powders or masses, followed by heat treatment to promote interdiffusion at characteristics based on chemical composition. The multiple diffusion method involves sintering or the interface. Mapping measurements are carried out within the compositional gradient. This technique welding various elemental powders or masses, followed by heat treatment to promote interdiffusion at offers an overview of multi-component phase diagrams. An example is provided for the Fe-Co-Ni phase the interface. Mapping measurements are carried out within the compositional gradient. This technique diagram determined using the multiple diffusion method. The process involved mixing and sintering offers an overview of multi-component phase diagrams. An example is provided for the Fe-Co-Ni phase elemental powders of Fe, Co, and Ni, followed by annealing and water cooling. EPMA mapping analysis diagram determined using the multiple diffusion method. The process involved mixing and sintering estimated the compositional range of phases. Subsequently, alloys were prepared based on these results, elemental powders of Fe, Co, and Ni, followed by annealing and water cooling. EPMA mapping analysis and diffusion couples were created. Phase boundary compositions were determined through point estimated the compositional range of phases. Subsequently, alloys were prepared based on these results, analyses, resulting in phase boundaries within the Fe-Co-Ni system. and diffusion couples were created. Phase boundary compositions were determined through point analyses, resulting in phase boundaries within the Fe-Co-Ni system. 42PP11--1155 PP11--1155 PP11--1166 Poster Presentation ｜NIMS Award Symposium 2023 P1 ｜ Processaterials Using Composition-graded aterials Using Composition-graded
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