材料工程2017，Vol.45Issue(9)：136-142,7.DOI:10.11868/j.issn.1001-4381.2016.000817
不同应力幅比加载下2A12铝合金的多轴疲劳性能
Multiaxial Fatigue Properties of 2A12 Aluminum Alloy Under Different Stress Amplitude Ratio Loadings
摘要
Abstract
The multiaxial fatigue behavior of 2A12 aluminum alloy was studied with SDN100/1000 electro-hydraulic servo tension-torsion fatigue tester under different stress amplitude ratios, the fracture morphology and the fatigue loading curve were observed to study the failure mechanism.The results show that, under the one stage loading condition, the fatigue life prolongs with the stress amplitude ratio increasing.Under pure torsion loading, smooth and even area exists in the fracture surface.As the stress amplitude ratio increases, the number of scratch reduces, the fatigue striation and some special morphology such as the fishbone pattern, scale pattern and honeycomb pattern can be observed;under cumulative paths of different stress amplitude ratios, the variation of multiaxial fatigue life changes with first stage loading cycles;under cumulative paths of high-low stress amplitude ratio, the cycle hardening occurs obviously in the axial direction for the first stage high stress amplitude ratio loading and 2A12 alloy shows training effect.关键词
2A12铝合金/应力幅比/多轴疲劳/失效机理/锻炼效应Key words
2A12 aluminum alloy/stress amplitude ratio/multiaxial fatigue/failure mechanism/training effect分类
数理科学引用本文复制引用
陈亚军,王先超,王付胜,周剑,吴悦雷..不同应力幅比加载下2A12铝合金的多轴疲劳性能[J].材料工程,2017,45(9):136-142,7.基金项目
国家自然科学基金项目(11502285) （11502285）
中央高校基本科研业务费中国民航大学专项资金项目(3122017112) （3122017112）
