沙粒粒径对TC4钛合金冲击界面损伤行为的影响

doi:10.16183/j.cnki.jsjtu.2018.05.010

摘要/Abstract

摘要： 在新型冲击磨损试验机上考察了沙粒粒径(120~380 μm)对TC4钛合金冲击损伤行为的影响，研究了不同沙粒环境下TC4钛合金的冲击磨损机制及其界面响应.结果表明：沙粒对TC4钛合金的冲击磨损行为影响显著，TC4钛合金在冲击过程中会出现沙粒破碎并堆积在钛合金表面，使其磨损表面明显增高；随着砂粒粒径不断增大，冲击力峰值显著减小，冲击接触时间变长，界面能量吸收率明显提高，磨损面积明显增大；随着冲击次数增加，冲击力峰值下降，界面能量吸收率提高，磨损表面的材料堆积体积逐渐增大.在沙粒的冲击作用下，TC4合金的冲击磨损机制主要表现为沙粒对材料的切削和磨屑在界面的堆积.

关键词: TC4 钛合金, 冲击磨损, 沙粒粒径, 冲击力, 磨屑堆积, 磨损机制

Abstract: Experiments with different particle sizes (120—380 μm) were carried out using a new type of impact wear test machine. The impact wear mechanism and interface response of TC4 alloy in sand and dust environment during impact were studied. The results showed that smalls and particle could significantly affect the impact wear behavior of TC4 alloy, and the sand particle will be broken and deposited on the surface during impact. The worn surface is relatively rough and significantly higher than the original surface of the specimen. As the particle size increased, the peak of impact force decreased significantly, the impact contact time got longer, the energy absorption increased, and the wear area became larger obviously. With the increase of impact cycles, the peak of impact force decreased, the energy absorption rate increased, and the volume of material accumulation tended to increase. The damage mechanism of TC4 alloy under particle impact wear is mainly manifested as the cutting and debris accumulation.

Key words: TC4 alloy, impact wear, particle size of sand, impact force, debris accumulation, wear mechanism

中图分类号:

TG 146.23

吴松波,蔡振兵,林禹,王璋,刘新龙,朱旻昊. 沙粒粒径对TC4钛合金冲击界面损伤行为的影响[J]. 上海交通大学学报（自然版）, 2018, 52(5): 568-574.

WU Songbo,CAI Zhenbing,LIN Yu,WANG Zhang,LIU Xinlong,ZHU Minhao. Effect of Sand Particle Size on the Damage Behavior of TC4 Alloy Impact Inter Face[J]. Journal of Shanghai Jiaotong University, 2018, 52(5): 568-574.

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