Ti-6Al-4V合金在真空中的干滑动磨损行为

在真空(10^-^5Pa)条件下对Ti-6Al-4V合金进行了系统的磨损性能测试，研究了载荷和滑动速度对Ti-6Al-4V合金磨损率的影响．对Ti-6Al-4V合金的磨损表面进行了显微组织分析．实验结果表明，Ti-6Al-4V合金的磨损率随载荷和滑动速度的升高而增加．磨损表面具有层状结构的舌状形貌特征，分析表明这是Ti-6Al-4V合金表面通过接触点处材料的被推挤和碾压过程形成了特殊的变形堆砌层的结果．显微组织分析显示，这种变形堆砌层具有50—100nm尺寸的细小显微组织结构和50mm以上的厚度．

Dry Sliding Wear Behavior of Ti-6Al-4V Alloy in Vacuum

The effects of load and sliding velocity on the wear rate of Ti-6Al-4V alloy in vacuum (10-5 Pa) were studied, and the microstructural analysis of the worn surface of Ti-6A1-4V alloy were carried out. The results show that the wear rate of Ti-6Al-4V alloy increases with increasing the load and sliding velocity. The worn surface is characterized by a step-like morphology with the layered structure, which is a result of forming a special deformed-stacked layer due to pushing and rolling of material at the contacting spot of the Ti-6Al-4V alloy. Microstructural analysis indicates that the so-called deformed-stacked layer presents a fine microstructure with a gain size range of 50-100 nm and a thickness of more than 50 mm.