摘要
通过研究载荷频率变化对690(TT)合金在含饱和氧的模拟压水堆一回路水环境中腐蚀疲劳裂纹扩展行为的影响,得到以下结论:随着载荷频率的降低,裂纹扩展速率(CGR)和环境影响因子(F_(en))均随之增大;裂纹扩展路径为穿晶型,在频率较低或应力比R较大时出现较多的支裂纹;断口呈典型的腐蚀疲劳断裂特征,裂纹在三维空间中扩展,可观察较多的微裂纹。
The corrosion fatigue crack growth behavior of 690 （TT） alloy was investigated in the simulated primary PWR water with saturated dissolved oxygen. The results are as follow：the crack growth rate （CGR） and Fen （environment factor） are increasing with the frequency reducing; crack growth path is triangular with a lot of second cracks under low frequency or high R ; the fracture shows obvious fatigue characteristics, and many microcracks can be observed.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2016年第2期36-41,共6页
Transactions of Materials and Heat Treatment
