Journal
SCRIPTA MATERIALIA
Volume 68, Issue 11, Pages 865-868Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.02.010
Keywords
Ferrite phase; TRIP steel; Three-stage; Work hardening; Austenite stability
Categories
Funding
- Natural Science Foundation of China [51031001]
- Center for Structural and Functional Materials
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In the context of obtaining high strength-high ductility combination in transformation-induced plasticity steels, we underscore the practical significance of controlling the stability of austenite during deformation such that strain hardening induced by martensite transformation occurs at a critical strain. An optimized intercritical hardening at 750 C led to a ferrite austenite microstructure that was characterized by similar to 64% austenite and excellent combination of tensile strength of similar to 1000 MPa and elongation of similar to 65%, and a three-stage work hardening behavior. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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