裴鸿勋
,
杨京俊
,
柯伟
金属学报
本文用海洋平台结构钢A537CL1的单边裂纹样品,在空气和3.5％ NaCl水溶液中进行了腐蚀疲劳短裂纹扩展实验,比较不同裂纹长度及环境介质对疲劳短裂纹扩展行为的影响。结果表明,在门槛值附近,对于相同的应力强度因子范围,短裂纹扩展速率比长裂纹扩展快。短裂纹扩展的门槛值随裂纹长度的减小而减小。与空气介质相比较,盐水对疲劳短裂纹扩展加速的程度远大于长裂纹。
关键词:
疲劳短裂纹
,
offshore platform steel
,
environment medium
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threshold stress intensity
WANG Zhengfu KE Wei Institute of Corrosion and Protection of Metals
,
Academia Sinica
,
Shenyang
,
ChinaZHU Zuming Insitute of Metal Research.Academia Sinica
,
Shenyang
,
China WANG Zhengfu Institute of Corrosion and Protection of Metals
,
Academia Sinica
,
Shenyang 110015
,
China
金属学报(英文版)
Acoustic emisssion(AE)behavior during fatigue in either airer or 3.5% NaCl solution has been studied for a structural steel(SM5OB-Zc)as quenched and normalized states.The ex- perimental results show that AE activity is strongly affected by the heat treatment and the condition of environment.Some material constants about A E related with fatigue behavior were obtained and the AE sources in corrosion fatigue were discussed.
关键词:
fatigue
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null
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null
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null
PEI Hongxun YANG Jingjun KE Wei Institute of Corrosion and Protection of Metals
,
Academia Sinica
,
Shenyang
,
China PEI Hongxun Institute of Corrosion and Protection of Metals
,
Academia Sinica
,
Shenyang
,
China
金属学报(英文版)
The effects of environmental media,both in atmosphere and in 3.5% NaCl aqueous solution, on the growth of short cracks in comparison with the long ones have been investigated under fatigue loading on the specimens of single-edge crack about 0.05—0.15 mm for A537CLI steel.The growth rate of short cracks is faster than those of long ones around the threshoht stress intensity.The threshold stress intensity for short crack growth decreases with de- creasing crack length.The acceleration effect of the salt water,as compared with atmosphere environment,on the growth of short cracks under fatigue is much greater than that on the growth of long cracks.
关键词:
short fatigue crack
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null
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null
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null
