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

Jung Gi Kim; Min Ji Jang; Hyung Keun Park; Kwang‑Geun Chin; Sunghak Lee; Hyoung Seop Kim

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자료유형: 학술저널

저자정보: Jung Gi Kim (Pohang University of Science and Technology (POSTECH)) Min Ji Jang (Pohang University of Science and Technology (POSTECH)) Hyung Keun Park (Pohang University of Science and Technology (POSTECH)) Kwang‑Geun Chin (Pohang University of Science and Technology (POSTECH)) Sunghak Lee (Pohang University of Science and Technology (POSTECH)) Hyoung Seop Kim (Pohang University of Science and Technology (POSTECH))

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.25 No.4

발행연도: 2019.1

수록면: 912 - 917 (6page)

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Although back-stress contributes to the mechanical properties of materials, the degree of strength enhancement from backstressis 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, andthe strength of TWIP + IF layered steel sheath is greater than the strength estimated by the rule-of-mixtures. A non-linearcombined 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 evolutionin heterogeneous materials contributes to their strength, and that the non-linear combined isotropic and kinematic hardeningshould be included to estimate the degree of back-stress hardening.

#Heterogeneous structure · Laminate materials · Back-stress · Mechanical properties · Finite element method

참고문헌 (24)

참고문헌 신청

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Y. Wei / 2014 / Nat. Commun 5:3580

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Kwang-Geun Chin / 2018 / Fabrication of Hadfield-Cored Multi-layer Steel Sheet by Roll-Bonding with 1.8-GPa-Strength-Grade Hot-Press-Forming Steel / Metals and Materials International 24(3):489~495

H. Springer / 2014 / Int. J. Mater. Res 106:3

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