摘要
介绍了自制的SEM程控疲劳台的基本情况,并利用此装置,直接观察了简单变幅疲劳中载荷交互作用所引起的裂纹扩展加速效应。
A fatigue programmable loading stage has been made by ourselves and installed in JSM-35C type SEM. The details of the apparatus were described. Direct observation was accomplished on accelerated fatigue crack growth under simple variable amplitude loading in LY-12 Al-alloy and 60Si2Mn steel by SEM. Results indicate that the three types of spike load, overload, underload, overload+underload, can also cause the initial accelera- tion of crack growth, as well as decreased crack closure stresses.
出处
《电子显微学报》
CAS
CSCD
1993年第4期330-335,共6页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金
批准号:5870059
59071028
