Overview of dynamic strain aging and associated phenomena in Fe-Mn-C austenitic steels

Motomichi Koyama; Takahiro Sawaguchi; Kaneaki Tsuzaki

doi:10.2355/isijinternational.ISIJINT-2018-237

Overview of dynamic strain aging and associated phenomena in Fe-Mn-C austenitic steels

Motomichi Koyama, Takahiro Sawaguchi, Kaneaki Tsuzaki

Strength of materials

Research output: Contribution to journal › Review article › peer-review

13 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1383-1395
Number of pages	13
Journal	isij international
Volume	58
Issue number	8
DOIs	https://doi.org/10.2355/isijinternational.ISIJINT-2018-237
Publication status	Published - Aug 15 2018

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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abstract = "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.",

author = "Motomichi Koyama and Takahiro Sawaguchi and Kaneaki Tsuzaki",

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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.

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