Article ID Journal Published Year Pages File Type
1573714 Materials Science and Engineering: A 2016 5 Pages PDF
Abstract
The strain rate sensitivity (SRS) of Fe-22Mn-0.6C and Fe-30Mn-3Si-3Al twinning-induced plasticity (TWIP) steel was studied in the strain rate range from 10−4 to 10 °s−1. The Fe-22Mn-0.6C steel exhibited negative SRS, while the Fe-30Mn-3Si-3Al steel showed positive SRS. Dynamic strain aging (DSA) was detected in Fe-22Mn-0.6C steel but not in Fe-30Mn-3Si-3Al steel. Accordingly, the two typical TWIP steels can be classified as DSA-facilitated and DSA-free TWIP steels. Meanwhile, the density of twin boundary obviously decreased in Fe-22Mn-0.6C steel but had little change in Fe-30Mn-3Si-3Al steel with increasing the strain rate. The different SRS phenomena were discussed based on the twinning mechanism and DSA effect.
Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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