Back-Stress Effect on the Mechanical Strength of TWIP-IF Steels Layered Sheet

被引：41

作者：

Kim, Jung Gi ^{[1
]}

Jang, Min Ji ^{[1
]}

Park, Hyung Keun ^{[1
]}

Chin, Kwang-Geun ^{[2
]}

Lee, Sunghak ^{[1
]}

Kim, Hyoung Seop ^{[1
,2
,3
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Dept Mat Sci & Engn, Pohang 37673, South Korea

[2] Pohang Univ Sci & Technol POSTECH, Grad Inst Ferrous Technol, Pohang 37673, South Korea

[3] Pohang Univ Sci & Technol POSTECH, Ctr High Entropy Alloys, Pohang 37673, South Korea

来源：

METALS AND MATERIALS INTERNATIONAL | 2019年 / 25卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

Heterogeneous structure; Laminate materials; Back-stress; Mechanical properties; Finite element method; GRADIENT; SPRINGBACK; DUCTILITY;

D O I：

10.1007/s12540-019-00258-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Although back-stress contributes to the mechanical properties of materials, the degree of strength enhancement from back-stress is not easy to estimate. In this research, back-stress hardening of twinning-induced plasticity (TWIP) + interstitial free (IF)-layered steel sheets were estimated by implementing a non-linear combined isotropic and kinematic hardening model. High back-stress evolution occurs due to plastic strain incompatibility between a TWIP-steel core and IF-steel sheath, and the strength of TWIP + IF layered steel sheath is greater than the strength estimated by the rule-of-mixtures. A non-linear combined isotropic and kinematic hardening model was used to estimate the strength enhancement from back-stress hardening, and the simulation results were correlated with the experimental results. This result shows that the back-stress evolution in heterogeneous materials contributes to their strength, and that the non-linear combined isotropic and kinematic hardening should be included to estimate the degree of back-stress hardening.

引用

页码：912 / 917

页数：6

共 24 条

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