【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。更多还原

【Abstract】 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 hydrogen concentration at the crack tip during the crack growth was presented.更多还原