Journal
SCRIPTA MATERIALIA
Volume 66, Issue 12, Pages 1012-1017Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2012.01.062
Keywords
TWIP steel; Hole expansion; Constitutive modeling; Fracture; Shear
Categories
Funding
- POSCO
- World Class University (WCU) through National Research Foundation of Korea
- Ministry of Education, Science and Technology [R32-10147]
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Fracture in the hole expansion test for a high-Mn twinning-induced plasticity (TWIP) steel sheet sample was investigated. The test results showed that cracking always occurred along the rolling direction (RD). The fracture behavior of the material was rationalized in terms of strain-rate sensitivity, yield surface shape and damage-producing MnS stringers aligned along the RD. In addition, according to the macroscopic constitutive modeling results, work hardening was shown to be almost isotropic for this material. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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