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

页码：681 / 684

页数：4

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