高强钢WOL试样应力腐蚀开裂的金相跟踪观察
Metallography Investigation of Hydrogen-induced Stress Corrosion Cracking for High-strength Steels
摘 要
高强钢WOL恒位移试样应力腐蚀的金相跟踪观察表明:高强钢的应力腐蚀在微裂纹出现之前,先在缺口前端出现滑移线,滑移线的出现是由于氢引起的,位错运动形成滑移台阶.氢促进局部塑性变形,当局部塑性变形发展到临界状态时,缺口前端就出现微裂纹.
塑性变形
微裂纹
位错
slip line
plastic deformation
micro-cracks
dislocation
Abstract
Metallographical track investigation of stress corrosion cracking of high-strength steels WOL constant displacement specimen indicated that the slip line of stress corrosion cracking of high-strength steels preexistence in notch front-end before the appearance of micro-cracks,hydrogen induced slip line and displacement step was caused by dislocation motion.Hydrogen could accelerate the local plastic deformation and the micro-crack appearance in gap front-end when the local plastic deformation run to critical condition.
中图分类号 TG172.9
所属栏目 试验研究
基金项目 国家重点基础研究规划项目(G1998061500)资助
收稿日期 2007/8/13
修改稿日期 2007/9/10
网络出版日期
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引用该论文: LI Hui-lu,YU Zhu-huan,QIANG Jun-feng,QIAO Li-jie,CHU Wu-yang. Metallography Investigation of Hydrogen-induced Stress Corrosion Cracking for High-strength Steels[J]. Corrosion & Protection, 2008, 29(10): 587～588
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参考文献
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