航空材料学报2013，Vol.33Issue(2)：46-50,5.DOI:10.3969/j.issn.1005-5053.2013.2.009
转动微动磨损条件下7075铝合金的局部疲劳行为研究
Local Fatigue Behavior of 7075 Alloy under Condition of Rotational Fretting Wear
摘要
Abstract
Rotational fretting wear tests of 7075 aluminum alloy against 52100 steel ball under the different angular displacement amplitudes were carried out on a new rotational fretting wear testing rig. The initiation and propagation behavior of local fatigue cracks induced by rotational fretting wear were studied based on the micro-analysis of surface and profile morphologies of wear scars. The results show that the fatigue cracks distribute mainly in the mixed fretting regime ( MFR) under the condition of rotational fretting wear, and most of them propagate into the matrix alloy. In the MFR, the material failure mechanism mainly was as a result of fatigue crack initiation and propagation accompanied with particles detachment by delamination. In the partial slip regime (PSR) , the fatigue crack expanded parallel to the direction of the surface and the fretting damages were mainly slight delamination. In the slip regime (SR) , the fatigue effect weakened and the wear of material was dominant during the competition process between the local contact fatigue and wear. In additional, the formation of local fatigue crack was closely related to the central convexity under the rotational fretting wear.关键词
摩擦磨损/转动微动/疲劳裂纹/7075铝合金Key words
friction and wear/ rotational fretting/ fatigue crack/ 7075 aluminum alloy分类
机械制造引用本文复制引用
沈明学,周琰,宋川,莫继良,蔡振兵,朱旻昊..转动微动磨损条件下7075铝合金的局部疲劳行为研究[J].航空材料学报,2013,33(2):46-50,5.基金项目
国家自然科学基金(51025519) （51025519）
教育部创新研究团队项目(IRT1178) （IRT1178）
中央高校基本科研业务费专项资金(SWJTU12ZT01) （SWJTU12ZT01）
