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中国腐蚀与防护学报  2008, Vol. 28 Issue (5): 282-286     
  论文 本期目录 | 过刊浏览 |
力学因素对管线钢应力腐蚀开裂裂纹萌生的影响
王志英;王俭秋;韩恩厚;柯 伟
中国科学院金属研究所金属腐蚀与防护国家重点实验室
THE EFFECT OF MECHANICAL FACTORS ON SCC INITIATION OF PIPELINE STEEL
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中国科学院金属研究所金属腐蚀与防护国家重点实验室
全文: PDF(1337 KB)  
摘要: 研究了应力比、加载频率和外加横向载荷等力学因素对X70管线钢在新疆土壤溶液中穿晶应力腐蚀开裂裂纹萌生的影响,并结合环境扫描电镜对腐蚀样品表面进行观察。结果表明:低应力比增加了载荷的波动,促进了管线钢应力腐蚀开裂裂纹的萌生;当波动载荷作用于样品的循环周次相同时,频率越低越有利于穿晶应力腐蚀开裂(TGSCC)裂纹的萌生;当波动载荷作用于样品的时间相同时,频率越高有利于裂纹的萌生;垂直于拉-拉应力方向的外加横向载荷促进了TGSCC裂纹的萌生。
关键词 管线钢应力腐蚀应力比频率裂纹萌生    
Abstract:The influence of stress ratio, loading frequency and additional stress on TGSCC initiation of X70 pipeline steel was mainly studied and ESEM observations of corrosion sample surfaces were carried out. The results showed that: low stress ratio increased the fluctuation of load, which facilitated the crack initiation of SCC of pipeline steel; the low frequency was in favor of initiation of TGSCC when the samples endured the same cycles of the fluctuating load; but the fast frequency was benefit to TGSCC initiation when the samples suffered the same time of the fluctuating load; and in our work no obvious effect of additional stress on the crack initiation was observed.
Key wordspipeline steel    stress corrosion cracking (SCC)    stress ratio    frequency    crack initiation
收稿日期: 2007-01-08     
ZTFLH:  TG172.9  
通讯作者: 王志英     E-mail: wangzy@imr.ac.cn

引用本文:

王志英; 王俭秋; 韩恩厚; 柯; 伟 . 力学因素对管线钢应力腐蚀开裂裂纹萌生的影响[J]. 中国腐蚀与防护学报, 2008, 28(5): 282-286 .

链接本文:

https://www.jcscp.org/CN/Y2008/V28/I5/282

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