Constitutive modeling of transformation-induced plasticity steels considering strength-differential effect

被引：0
|
作者：
Jung, Jaebong [1 ,2 ]
Park, Hyeonil [3 ]
Lee, Seung Wook [1 ]
Kim, Ji Hoon [1 ]
机构：
[1] School of Mechanical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Busan,46241, Korea, Republic of
[2] Safety Performance CAE Team, Hyundai Motor Company, Gyeonggi-do, Hawseong-si,18270, Korea, Republic of
[3] Korea Institute of Materials Science, 797 Changwondaero, Gyeongnam, Changwon,51508, Korea, Republic of
来源：
Mechanics of Materials | 2025年 / 200卷
关键词：
Transformation Induced Plasticity steel;
D O I：
10.1016/j.mechmat.2024.105207
中图分类号：
学科分类号：
摘要：
Transformation-induced plasticity (TRIP) steels undergo martensitic phase transformations due to their austenite phase. In this study, using 1-mm-thick TRIP steel at room temperature, the phase transformation behaviors under tensile and compressive modes were measured using a ferrite scope based on the detection of the magnetic volume. A strength differential (SD) effect was observed, where the tensile strength was lower than the compressive strength. The rate of tensile transformation was faster than that of compressive transformation. To account for the SD effect in finite element analysis, a martensitic kinetics-based constitutive model was developed, which was decomposed into elastic, plastic, Bain, and transformational parts. A larger transformational strain was generated in the tensile mode, and the asymmetric SD effect was captured well by the proposed model. © 2024 Elsevier Ltd
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