Large deformation mechanism of lath martensite of low carbon steel in multilayered composite

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630262
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: The University of Tokyo
• Principal Investigator: INOUE Junya 東京大学, 工学(系)研究科(研究院), 准教授 (70312973)
• Co-Investigator(Kenkyū-buntansha): OJIMA Mayumi 東京大学, 大学院工学系研究科, 助教 (80569799)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 鋼ラスマルテンサイト

Outline of Final Research Achievements

Development of new generation advanced high strength steel is widely conducted to achieve a tensile strength more than 1.5GPa and fracture elongation more than 20% at the same time. In this study, the deformation behavior of lath martensite of low carbon steel is investigated from both macroscopic and microscopic points of view. For the macro-level, stress partition measurement by synchrotron white X-ray was employed, while for the micro-level slip system analysis by SEM-EBSD measurement was applied. The results indicate that the local deformation of lath martensite is substantially influenced by the anisotropic activation of slip system.

Free Research Field

材料力学