2.25Cr-1Mo钢氢致裂纹扩展行为研究  

An Investigation of the Growth Behavior of Hydrogen-induced Crack in 2.25Cr-1Mo Steel

作　　者：温吉利[1] 华丽[1] 徐宏[1] 王志文[1] 王正东[1] 

机构地区：[1]华东理工大学,上海200237

出　　处：《腐蚀与防护》2008年第3期121-124,共4页Corrosion & Protection

摘　　要：采用电解充氢方法对2.25Cr-1Mo钢氢致裂纹扩展进行试验,并采用甘油测氢法测定了2.25Cr-1Mo钢发生裂纹扩展时钢中扩散的平均氢浓度。为了进一步了解裂纹尖端的氢浓度大小对裂纹扩展的影响,利用有限元软件对氢在2.25Cr-1Mo钢中的扩散过程进行模拟分析,系统研究了在应力-氢环境交互作用下裂纹尖端周围的氢扩散规律,并给出了裂纹扩展时裂尖局部位置的氢浓度大小。A technique of electrochemical hydrogen charging was used to study the behavior of hydrogen-induced cracking.The average hydrogen concentration diffused in 2.25Cr-1Mo steel during hydrogen-induced cracking(HIC) was measured.In order to investigate the relationship between hydrogen concentration near the crack tip and HIC,a finite element analysis was adopted to simulate the hydrogen diffusion regularity near the crack tip in the interaction between stress and hydrogen environment.And the magnitude of hydrog...

关 键 词：电解充氢 2.25CR-1MO钢 裂纹扩展 有限元分析 氢扩散 裂纹尖端 

分 类 号：TG142.15[一般工业技术—材料科学与工程]