Caliber-rolled TWIP steel for high-strength wire rods with enhanced hydrogen-delayed fracture resistance

被引：55
作者：
Chun, Young Soo [1 ]
Lee, Junmo [1 ]
Bae, Chul Min [2 ]
Park, Kyung-Tae [3 ]
Lee, Chong Soo [1 ,4 ]
机构：
[1] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea
[2] POSCO, Tech Res Labs, Pohang 790785, South Korea
[3] Hanbat Natl Univ, Div Adv Mat Sci & Engn, Taejon 305719, South Korea
[4] Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Pohang 790784, South Korea
来源：
SCRIPTA MATERIALIA | 2012年 / 67卷 / 7-8期
关键词：
Twinning-induced plasticity steel; Hydrogen embrittlement; Caliber rolling; High strength steel; Bolt; TENSILE PROPERTIES; TIC PARTICLES; BEHAVIOR; STRAIN; EMBRITTLEMENT; TEMPERATURE;
D O I：
10.1016/j.scriptamat.2012.07.006
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Twinning-induced plasticity (TWIP) steels were fabricated in wire rods via cold caliber rolling (CCR), and their microstructure, mechanical properties and hydrogen-delayed fracture (HDF) resistance were evaluated. CCR TWIP steels showed a better combination of strength and ductility than conventional bolt steels as a result of CCR inducing all possible {111}< 112 > twins. The HDF resistance of CCR TWIP steels was excellent, owing to the inherently low hydrogen diffusivity of the face-centered cubic structure and the high density of non-diffusible hydrogen trapping sites. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：681 / 684
页数：4
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