基于新型试验装置的TC_4钛合金面接触微动磨损行为研究

Research on Fretting Wear Behavior of TC_4 Titanium Alloy under Surface Contact based on New Test Device

自主设计了一套微动磨损夹具装置,可以更好地实现线/面、面/面接触。设置一组喷丸强度梯度处理Ti-6Al-4V合金试样,并与未喷丸磨光态试样进行对比试验分析。探讨喷丸处理对Ti-6Al-4V合金试样面/面接触形式微动磨损性能改善效果。试验结果表明,喷丸强化影响效果随喷丸强度参数变化而波动,其中,0. 20mmA喷丸强度处理在所有喷丸参数中表现最优。微动参数倾向于大滑移状态时,0. 20mmA喷丸强度处理试样较未喷丸磨光试样表现出一定的抗面/面接触形式微动磨损性能;在微动参数倾向于黏着状态时,0. 20mmA喷丸强度处理试样并未表现出良好的微动磨损抗性。

The fretting wear of Ti-6Al-4V under line contact and surface contact is carried out by using a self-designed reliable device. Ti-6Al-4V sample is treated by shot peening at different shot peening intensity, and contrasted with the sample which is only polished. The effect of shot peening on the performance improvement of fretting wear of Ti-6Al-4V under surface contact is studied. The test results show that the effect of shot peening is fluctuated with the change of shot peening intensity, and the intensity of 0.20mmA has the best performance. The effect also closely relates to the fretting parameters. When the fretting tends to slip, the sample treated by shot peening at 0.20mmA shows the better resistance of fretting wear under line and surface contact, and when the fretting tends to adhesive, the positive impact of shot peening is not obvious.