Effect of post-weld heat treatment on hydrogen-assisted cracking behavior of high-strength process pipe steel in a sour environment

被引：14
|
作者：
Kim, Sung Jin [1 ]
Jung, Hwan Gyo [2 ]
Kim, Kyoo Young [1 ]
机构：
[1] Pohang Univ Sci & Technol POSTECH, GIFT, Pohang 790784, South Korea
[2] POSCO Tech Res Labs, Pohang 790704, South Korea
来源：
SCRIPTA MATERIALIA | 2012年 / 67卷 / 11期
关键词：
Tempering; Transmission electron microscopy (TEM); High-strength low-alloy (HSLA) steels; Hydrogen embrittlement; Acicular ferrite; SULFIDE STRESS CRACKING; TRAPPING EFFICIENCY; MICROSTRUCTURE; PERMEATION; PERMEABILITY; SUSCEPTIBILITY; RESISTANCE; DIFFUSION;
D O I：
10.1016/j.scriptamat.2012.08.021
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The influence of post-weld heat treatment on hydrogen-assisted cracking of process pipe steel is investigated in terms of change in hydrogen trapping site. This study reports that, contrary to other microstructures, in acicular ferrite, cementite bodies acting as reversible trapping sites for hydrogen atoms are newly precipitated along the grain boundary by the post-weld heat treatment conducted at 620 degrees C. This leads to an increase in diffusible hydrogen content in the steel that makes it more susceptible to hydrogen-induced cracking. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：895 / 898
页数：4
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