Journal
SCRIPTA MATERIALIA
Volume 127, Issue -, Pages 10-14Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.08.034
Keywords
Twinning-induced plasticity steel; Mechanical properties; Strain hardening; Cr/Mo alloying
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Funding
- National Natural Science Foundation of China [51171166]
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The effects of Cr/Mo alloying on the tensile deformation behavior of Fe-Mn-C twinning-induced plasticity steel were investigated. The results showed that Cr/Mo alloying increases both the strength and ductility significantly and concurrently. As compared with the premature saturation of deformation twinning in the Cr/Mo-free steel, a unique twinning behavior occurs in the Cr/Mo-alloyed steel, i.e., retarded but more persistent formation of thinner twins with straining. This unique twinning behavior gives rise to a sustained high strain-hardening rate up to higher strains, which delays the plastic instability and increases both strength and ductility simultaneously. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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