Room-temperature blue brittleness of Fe-Mn-C austenitic steels

被引：39

作者：

Koyama, Motomichi ^{[1
]}

Shimomura, Yusaku ^{[1
]}

Chiba, Aya ^{[2
]}

Akiyama, Eiji ^{[3
]}

Tsuzaki, Kaneaki ^{[1
]}

机构：

[1] Kyushu Univ, Dept Mech Engn, Nishi Ku, Motooka 744, Fukuoka, Fukuoka 8190395, Japan

[2] Natl Inst Mat Sci, Sengen 1-2-1, Tsukuba, Ibaraki 3050047, Japan

[3] Tohoku Univ, Inst Mat Res, Aoba Ku, Katahira 2-1-1, Sendai, Miyagi 9808577, Japan

来源：

SCRIPTA MATERIALIA | 2017年 / 141卷

关键词：

Dynamic strain aging; Blue brittleness; Austenitic steel; Deformation twinning; Ductile fracture; INDUCED PLASTICITY STEELS; STACKING-FAULT ENERGY; HADFIELD MANGANESE STEEL; DEFORMATION; CARBON; MECHANISMS; BEHAVIOR; FRACTURE; EVOLUTION; GRAIN;

D O I：

10.1016/j.scriptamat.2017.07.017

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fe-33Mn-xC (x = 0,03,0.6,0.8, 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 Considere's criterion even at high strain rates. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：20 / 23

页数：4

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