摘要
在应力控制下,分析带有涂层的LY12CZ铝合金构件疲劳断裂方式。结果表明,拉伸断裂和疲劳断裂位置和方式是完全不同的。疲劳是在各个铆孔处均有裂纹萌生,但其中有一处发展为主裂纹,扩展距离较长,最后与其他裂纹汇合,最终导致在铆孔位置疲劳断裂。而拉伸时是铆钉剪切断裂,铆孔完整,无破坏迹象。
The fatigue fracture mode of LY12CZ aluminum alloy specimen with coating is investigated under stress control condition. The results show that the site and mode of fracture under tension and fatigue are completely different. Under fatigue condition, the cracks are initiated from every rivet holes, but one of these cracks is propagated longer and developed into the main crack, which finally is converged with other cracks and leads to the fatigue fracture on the rivet holes. However, shear fracture occurs on the rivets under tensile condition, the rivet holes are complete and no damage is observed on the rivet holes.
出处
《有色金属》
CSCD
北大核心
2007年第1期17-20,共4页
Nonferrous Metals
基金
辽宁省教育厅科学研究计划资助项目(20040235)
关键词
金属材料
铝合金
构件
疲劳断裂
metal material
aluminum alloy
structural part
fatigue fracture
作者简介
张正贵（1964-），男，山东临朐县人，副教授，硕士，主要从事金属材料的疲劳及性能表征等方面的研究。
