TY - JOUR
T1 - Overview of dynamic strain aging and associated phenomena in Fe-Mn-C austenitic steels
AU - Koyama, Motomichi
AU - Sawaguchi, Takahiro
AU - Tsuzaki, Kaneaki
N1 - Funding Information:
This paper was financially supported by JSPS KAKENHI
Publisher Copyright:
© 2018 ISIJ.
PY - 2018/8/15
Y1 - 2018/8/15
N2 - This paper presents an overview of the recent works on dynamic strain aging (DSA) of Fe-Mn-C austenitic steels including Hadfield and twinning-induced plasticity (TWIP) steels. First, a model of the DSA mechanism and its controlling factors are briefly explained in terms of Mn-C coupling and dislocation separation. Then, we introduce the effects of DSA on mechanical properties such as work hardening capability, uniform elongation, post-uniform elongation, and fatigue strength. Specifically, we note (1) the pinning effect on extended dislocation for the work hardening, (2) the Poretvin-Le Chatelier banding effect on damage evolution for the tensile elongation, and (3) the crack tip hardening/softening effect on crack resistance for the fatigue strength. We believe that this overview will help in designing advanced highstrength steels with superior ductility and fatigue resistance.
AB - This paper presents an overview of the recent works on dynamic strain aging (DSA) of Fe-Mn-C austenitic steels including Hadfield and twinning-induced plasticity (TWIP) steels. First, a model of the DSA mechanism and its controlling factors are briefly explained in terms of Mn-C coupling and dislocation separation. Then, we introduce the effects of DSA on mechanical properties such as work hardening capability, uniform elongation, post-uniform elongation, and fatigue strength. Specifically, we note (1) the pinning effect on extended dislocation for the work hardening, (2) the Poretvin-Le Chatelier banding effect on damage evolution for the tensile elongation, and (3) the crack tip hardening/softening effect on crack resistance for the fatigue strength. We believe that this overview will help in designing advanced highstrength steels with superior ductility and fatigue resistance.
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U2 - 10.2355/isijinternational.ISIJINT-2018-237
DO - 10.2355/isijinternational.ISIJINT-2018-237
M3 - Review article
AN - SCOPUS:85051480581
VL - 58
SP - 1383
EP - 1395
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
SN - 0915-1559
IS - 8
ER -