Dominant factors that cause the difference in material microstructure

2015 Fiscal Year Final Research Report

• Project/Area Number: 26820282
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: Nagoya University (2015); Nagoya Institute of Technology (2014)
• Principal Investigator: Tsukada Yuhki 名古屋大学, 工学(系)研究科(研究院), 助教 (00620733)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: フェーズフィールド法 / 鉄鋼材料 / マルテンサイト変態 / 転位 / 弾性ひずみエネルギー

Outline of Final Research Achievements

Martensitic transformation in low-carbon steels was simulated on the basis of the phase-field method. It was found that the presence of slip in the matrix phase changed the relaxation process of elastic strain energy and caused the difference in martensite microstructure. On the other hand, the presence of slip in the matrix phase had little effect on the formation of martensite habit plane. In addition, effect of the value of yield stress on the martensite microstructure was simulated by the phase-filed method. It was found that when the value of yield stress was not lower than 500 MPa, the martensite microstructure became fine with increasing the value of yield stress.

Free Research Field

材料組織学