Ti6Al4V合金氢致脆性磨损机制  

BEHAVIOUR OF HYDROGEN INDUCED \=CORROSION WEAR OF Ti6Al4V ALLOY

作　　者：张天成[1,2] 姜晓霞[1,2] 李诗卓 

机构地区：[1]北京科技大学表面科学与腐蚀工程系 [2]中国科学院金属研究所

出　　处：《腐蚀科学与防护技术》1999年第3期142-146,共5页Corrosion Science and Protection Technology

基　　金：国家自然科学基金

摘　　要：用自制的高精度单摆划痕装置，分别测量了Ｔｉ６Ａｌ４Ｖ合金在空气以及０．５ｍｏｌ／ＬＨ２ＳＯ４溶液中于不同腐蚀电位下腐蚀和腐蚀磨损过程中的比能耗、材料流失量、摩擦系数和动态硬度等．用离子探针测定了划痕表面的氢含量．用ＳＥＭ观察了划痕的形貌．结果表明，磨损将诱导氢在磨损表面的富集，使材料流失单位体积所消耗的能量降低从而使剪应力作用下的表面裂纹更容易形核和扩展．The changes of specific energy consumption, material losses, friction coefficient and dynamic hardness of Ti6Al4V during corrosive wear process in 0.5 mol/L H2SO4 solution at different potentials and in air were investigated using a pendulum scratching apparatus, the hydrogen contents in scratching tracks was measured with SIMS, and the morphologies of scratching tracks were observed by SEM. The results showed that the wear process induced the hydrogen concentrating at wear subsurface, which decreased the energy consumption per unit volume of material loss and facilitated the nucleation and propagation of the surface cracks.\=

关 键 词：腐蚀磨损 氢致磨损 单摆划痕 钛合金 

分 类 号：TG172.2[金属学及工艺—金属表面处理] TG146.23[金属学及工艺—金属学]