TY - JOUR
T1 - Room-temperature blue brittleness of Fe-Mn-C austenitic steels
AU - Koyama, Motomichi
AU - Shimomura, Yusaku
AU - Chiba, Aya
AU - Akiyama, Eiji
AU - Tsuzaki, Kaneaki
N1 - Publisher Copyright:
© 2017 Acta Materialia Inc.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/12
Y1 - 2017/12
N2 - Fe-33Mn-xC (x = 0, 0.3, 0.6, 0.8, and 1.1 mass%) fully austenitic steels showed ductility degradation owing to dynamic strain aging (DSA). The elongation increased with increasing carbon concentration at a strain rate of 10− 2 s− 1. However, in the steels with carbon contents of 0.6%, 0.8%, and 1.1%, the elongation decreased with increasing carbon concentration at a strain rate of 10− 5 s− 1 where the DAS effect is distinct. Although all specimens showed ductile fracture with the formation of dimples, the work hardening-true stress relation of the Fe-33Mn-1.1C steel demonstrated fracture before satisfying Considère's criterion even at high strain rates.
AB - Fe-33Mn-xC (x = 0, 0.3, 0.6, 0.8, and 1.1 mass%) fully austenitic steels showed ductility degradation owing to dynamic strain aging (DSA). The elongation increased with increasing carbon concentration at a strain rate of 10− 2 s− 1. However, in the steels with carbon contents of 0.6%, 0.8%, and 1.1%, the elongation decreased with increasing carbon concentration at a strain rate of 10− 5 s− 1 where the DAS effect is distinct. Although all specimens showed ductile fracture with the formation of dimples, the work hardening-true stress relation of the Fe-33Mn-1.1C steel demonstrated fracture before satisfying Considère's criterion even at high strain rates.
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U2 - 10.1016/j.scriptamat.2017.07.017
DO - 10.1016/j.scriptamat.2017.07.017
M3 - Article
AN - SCOPUS:85024897628
VL - 141
SP - 20
EP - 23
JO - Scripta Materialia
JF - Scripta Materialia
SN - 1359-6462
ER -