Threshold Stress Intensity of Hydrogen-Induced Cracking and Stress Corrosion Cracking of High Streng

• 作 者: LI Hui-lu GAO Ke-wei QIAO Li-jie WANG Yan-bing CHU Wu-yang HUI Wei-jun DONG Han WENG Yu-qing
• 机 构: University of Science and Technology Beijing,Central Iron & Steel Research Institute,
• 出 处: Journal of Iron and Steel Research(International)
• 发表日期: 2001年02期
• 关键词: High Strength Steel Stress Corrosion Cracking high strength steel stress intensi

The threshold stress intensity of stress corrosion cracking(SCC) for 40 CrMo steel in 3.5%NaCl solution decreased exponentially with the increase of yield strength.The threshold stress intensity of hydrogen-induced cracking during dynamical charging for 40 CrMo steel decreased linearly with the logarithm of the concentration of diffusible hydrogen.This equation was also applicable to SCC of high strength steel in aqueous solution.The critical hydrogen enrichment concentration necessary for SCC of high strength steel in water decreased exponentially with the increase of yield strength.Based on the results,the relationship between K_(ISCC) and σ_(ys) could be deduced.

The threshold stress intensity of stress corrosion cracking (SCC) for 40 CrMo steel in 3.5% NaCl solution decreased exponentially with the increase of yield strength. The threshold stress intensity of hydrogen-induced cracking during dynamical charging for 40 CrMo steel decreased linearly with the logarithm of the concentration of diffusible hydrogen. This equation was also applicable to SCC of high strength steel in aqueous solution. The critical hydrogen enrichment concentration necessary for SCC of high strength steel in water decreased exponentially with the increase of yield strength.Based on the results, the relationship between K_ (ISCC) and σ_ (ys) could be deduced.