東京大学 · 工学
Wujun Yin教授の研究室では、金属材料の微視的構造と力学的挙動の関係を解明することを目的としています。特に、長周期スタッキングオーダー相を有するMg-Zn-Y系合金や、Q&T・Q&P処理を施した高炭素鋼の多相構造と微小変形挙動の相関を、原子プローブトモグラフィーと高分解能デジタル画像相関法を用いて精密に解析しています。材料の強度と延性のバランスを制御するための微視的メカニズムの解明が、次世代高強度・高延性金属材料の開発に貢献します。
Figures are computed from collected data and may differ slightly.
In long period stacking ordered (LPSO) phase containing Mg-Zn-Y alloys, high elastic modulus and deformation kinks of LPSO phase considerably enhance the tensile yield strength, with slight detriment of or benefit to the ductility depending on its volume fraction. In present work, uniaxial tensile tests and fracture toughness tests are carried out using Mg99.2Zn0.2Y0.6, Mg97Zn1Y2, Mg89Zn4Y7 and Mg85Zn6Y9 (at%) materials with different extrusion ratios. Extrusion processing enhances both strength
Exploring the micromechanical behavior of lath-martensitic quenching and tempering (Q&T), as well as quenching and partitioning (Q&P) steels presents a significant challenge due to their complex multi-phase constituents and hierarchical structures. This study conducts a comprehensive comparative analysis using medium-carbon Q&T and Q&P steels with identical chemical compositions. Atom probe tomography (APT) was used to investigate the distribution of chemical elements, while high-resolution digi
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