模拟体液环境下TAMZ合金的微磨粒磨损行为研究

Micro-abrasion Performances of TAMZ Alloy in Simulated Body Fluid

采用TE66试验机对新型TAMZ钛合金的微磨粒磨损行为进行了研究。系统地考察了载荷、料浆浓度等因素对磨损率和摩擦因数的影响,建立了磨损机制图,并分析了磨损与腐蚀的协同作用。研究表明:在不同滑移距离时,TAMZ钛合金的磨损率均随载荷增加先减小后增大,随着料浆浓度的增加而增大。摩擦因数随着载荷增加呈现增大趋势,且在蒸馏水中摩擦因数的变化比在Hank’s模拟体液中平稳。当料浆浓度较低时,磨损机制为二体磨损机制;随着料浆浓度增加、载荷增大,磨损机制向混合磨损和三体磨损转变。随着载荷增加,腐蚀与磨损的交互作用增强,而在交互作用中,微磨损所起的作用比腐蚀所起的作用要大。

The micro-scale abrasive wear behaviors of TAMZ alloy were studied using a TE66 micro-scale abrasion test- er. The influence of load and slurry concentration on wear rate and friction coefficient were investigated. Micro-abrasion re- gime map for TAMZ titanium alloys was constructed, and the synergistic effects between micro-abrasion and corrosion were analyzed. The results show that the wear rate firstly decreases and then increases with the increase of load while at different sliding distance, and it increases with the increase of slurry concentration. The friction coefficient increases with the in- crease of load, and the transformation of friction coefficient in distilled water is balanced than that in Hank＇ s solution. The wear regime is two-body abrasion while the slurry concentration is low ,with the increase of slurry concentration and load, the wear regime is turned to mixed abrasion and three-body abrasion. The synergistic effect between micro-abrasion and corrosion increases with the increase of load, and the contribution of micro-abrasion on the synergistic effect is larger than that of corrosion.