摘要
主要研究了不同应变速率对X70管线钢在库尔勒土壤模拟溶液中应力腐蚀行为的影响。采用慢应变速率拉伸实验（SSRT）研究了不同应变速率下X70管线钢在模拟溶液中应力腐蚀开裂行为,并利用扫描电镜分析了不同应变速率下的断面形貌。结果表明,应变速率（特别是局部应变速率）对X70管线钢在库尔勒土壤模拟溶液中应力腐蚀行为有重要影响,应变速率在5×10^-7-5×10^-6s^-1之间有较强的应力腐蚀开裂敏感性,在裂纹扩展不同阶段氢和阳极溶解交互作用相对贡献大小不同。
The effect of strain rate on stress corrosion cracking （SCC） behavior of X70 pipeline steel in simulated korla soil solution was investigated. The stress corrosion cracking behavior of X70 pipeline steel in simulated solution was investigated by using slow strain rate test （SSRT）. The morphologies of X70 pipeline steel fracture surface at different strain rate were analyzed by scanning electron microscope （SEM）. The results showed that strain rate, especial local strain rate, greatly influenced the stress corrosion cracking of X70 pipeline steel. X70 pipeline steel was susceptible to stress corrosion cracking at strain rates ranging from 5×10^-7-5×10^-6s^-1 in simulated solution. At different stages of crack growth, the relative contribution of interaction between hydrogen and anodic dissolution was different.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2009年第10期55-59,共5页
Journal of Iron and Steel Research
基金
国家科技基础条件平台建设资助项目(2005DKA10400)
国家十一五科技支撑计划资助项目(2006BAK02B01)
关键词
管线钢
应力腐蚀开裂
应变速率
pipeline steel
stress corrosion cracking
strain rate
