期刊
METALS AND MATERIALS INTERNATIONAL
卷 15, 期 4, 页码 637-647出版社
KOREAN INST METALS MATERIALS
DOI: 10.1007/s12540-009-0637-z
关键词
TWIP steel; metal forming; AHSS; spring-back; permanent softening
资金
- POSCO
- Korea Science and Engineering Foundation (KOSEF) [R11-2005-065]
In an effort to reduce the weight of vehicles, automotive companies are replacing conventional steel parts with light weight alloys and/or with advanced high strength steels (AHSS) such as dual-phase (DP), twinning induced plasticity (TWIP), and transformation induced plasticity (TRIP) steels. The main objective of this work is to experimentally and numerically evaluate the macro-performance of the automotive TWIP sheet in conjunction with springback. In order to characterize the mechanical properties, simple tension and tension-compression tests were performed to determine anisotropic properties, as well as the Bauschinger, transient, and permanent softening behaviors during reverse loading. For numerical simulations, the anisotropic yield function Yld2000-2d was utilized along with the combined isotropic-kinematic hardening law based on the modified Chaboche model. Springback verification was performed for the unconstrained cylindrical bending and 2D draw bending tests.
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