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] Pusan Natl Univ, Sch Mech Engn, 2 Busandaehak Ro 63 beon Gil, Busan 46241, South Korea
[2] Hyundai Motor Co, Safety Performance CAE Team, Hwaseong Si 18270, Gyeonggi Do, South Korea
[3] Korea Inst Mat Sci, 797 Changwondaero, Chang Won 51508, South Korea
来源：
MECHANICS OF MATERIALS | 2025年 / 200卷
基金：
新加坡国家研究基金会;
关键词：
Advanced high-strength steels; Transformation-induced plasticity; Phase transformation; Tension-compression asymmetry; Strength differential effect; Constitutive equations; Finite element analysis; INDUCED MARTENSITIC-TRANSFORMATION; AUSTENITIC STAINLESS-STEELS; PHASE-TRANSFORMATION; DEFORMATION-BEHAVIOR; STRESS-STATE; TRIP STEELS; STRAIN; KINETICS;
D O I：
10.1016/j.mechmat.2024.105207
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
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页数：7
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