摘要
本文用弹塑性断裂力学分别研究了在空气和氢中 ,压力容器器壁的承载材料 2 ( 1 / 4 )Cr— 1 Mo钢的短裂纹低频疲劳特性 ,结果表明 :都可用 da/ d N =C(ΔJ) n 的关系式计算上述两环境中的短裂纹扩展速率 .裂纹呈穿晶扩展 .氢明显增加了 2 ( 1 / 4 ) Cr— 1
The characteristics of pure mechanical fatigue and hydrogen corrosion fatigue of short\|crack in \{2(1/4)Cr\_1Mo\} steel have been investigated by employing elastic\|plastic fracture mechanics. The crack propagation rate and threshold value are calculated using \{d\%a\%/d\%N\}=\{C(ΔJ)\+n\%\}. The results showed that.\;The crack was transgranular. The hydrogen increased the fracture sensitivity of \{2(1/4)Cr\_1Mo\} steel.
出处
《中国计量学院学报》
1999年第2期64-67,84,共5页
Journal of China Jiliang University
基金
浙江省自然科学基金! ( 5 980 2 3 )
关键词
短裂纹
机械疲劳
氢腐蚀疲劳
da/dN~ΔJ关系
门槛值
Short\|crack
Mechanical fatigue
Hydrogen corrosion fatigue
d\%a\%/d\%N~ΔJ\% relation
Threshold value
