TC4合金微动磨损颗粒的运动分布  

Distribution of the Wear Particles for TC4 Alloy in Fretting

作　　者：何燕妮[1] 俞树荣[2] 李淑欣 邵晨 尘强 He Yanni;Yu Shurong;Li Shuxin;Shao Chen;Chen Qiang(Lanzhou University of Technology,Lanzhou 730050,China;Ningbo University,Ningbo 315211,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]兰州理工大学,甘肃兰州730050 [3]宁波大学,浙江宁波315211

出　　处：《稀有金属材料与工程》2020年第4期1250-1255,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51275225)。

摘　　要：完善钛合金微动摩擦磨损特性数据,以磨损颗粒在不同位移幅值下于界面间的运动分布为手段,研究不同运动分布下的微动行为和损伤机制。结果表明:位移幅值显著影响着磨损颗粒的运动分布。小位移下中心粘着撕裂形成的片状脱层沿垂直于微动的方向堆积成"脊";中等位移下磨屑颗粒平铺于接触表面;较大位移下团簇状磨屑沿平行于微动的方向重新聚集成水平"脊"。磨屑在接触界面不同的运动分布导致磨损机制由粘着磨损,过渡到磨粒伴随轻微粘着,最终以磨粒伴随氧化磨损为主。To have a better understanding of fretting wear for titanium alloys,the effect of wear particles distribution on coefficient of friction,wear volume,surface topography and damage mechanisms at various displacement amplitudes was investigated.The results show that the displacement amplitude has a significant influence on the distribution of the fretting wear particles.The"flake-like"delamination formed by the central adhesive tear is stacked into a"ridge"in a direction perpendicular to the fretting at a relatively low fretting-amplitude.At a medium amplitude,the debris particles are scattered on the contact surface.When the amplitude is even increased,"cluster-like"debris are accumulated into a"ridge"parallel to the direction of the fretting.The various distribution of the wear particles leads to the change in the wear mechanisms from the adhesion to abrasion with slight adhesion,and finally to the abrasion accompanied with the oxidative wear.

关 键 词：TC4合金 微动磨损 磨损颗粒 位移幅值 运动分布 

分 类 号：TG146.23[一般工业技术—材料科学与工程]