Tribological Behavior of AlCoCrFeNi(Ti0.5) High Entropy Alloys under Oil and MACs Lubrication
Tribological Behavior of AlCoCrFeNi(Ti0.5) High Entropy Alloys under Oil and MACs Lubrication
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DOI：
10.1016/j.jmst.2016.02.005
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发表时间：
2016-05
影响因子：
10.9
通讯作者：
Yuan Yu;Jun Wang;Jinshan Li;Jun Yang;H. Kou;Wei-min Liu
中科院分区：
文献类型：
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作者：
Yuan Yu;Jun Wang;Jinshan Li;Jun Yang;H. Kou;Wei-min Liu
研究了AlCoCrFeNi和AlCoCrFeNiTi0.5高熵合金在齿轮油和多元烷基化环戊烷(MACS)润滑条件下的摩擦学性能。AlCoCrFeNi合金经热处理后获得等轴晶组织。AlCoCrFeNiTi0.5合金保持枝晶组织。在具有良好润滑作用的齿轮油中，AlCoCrFeNiTi0.5合金比AlCoCrFeNi合金具有更好的摩擦学性能。AlCoCrFeNi合金的分层和断裂倾向于发生在AlCoCrFeNiTi0.5合金的晶界和枝晶间区域。在润滑作用较差的MACS下，外加载荷对AlCoCrFeNi合金的磨损行为影响较小，但对AlCoCrFeNiTi0.5合金的磨损机理影响较大。与AlCoCrFeNi合金相比，AlCoCrFeNiTi0.5合金在100 N的低载荷下具有较好的耐磨性，而在200 N的高载荷下耐磨性较差。
The tribological properties of AlCoCrFeNi and AlCoCrFeNiTi0.5high entropy alloys under gear oil and multiply alkylated cyclopentanes (MACs) lubrication condition have been studied. The equiaxed crystal structure of AlCoCrFeNi alloy is obtained after heat-treatment. The AlCoCrFeNiTi0.5alloy keeps dendrite structure. Under the gear oil with good lubrication action, AlCoCrFeNiTi0.5alloy preserves better tribological properties than AlCoCrFeNi alloy. The delamination and crack behaviors tend to occur in the grain boundary of AlCoCrFeNi alloy and along the interdendrite region of AlCoCrFeNiTi0.5alloy. Under the MACs with relatively poor lubrication action, the applied load slightly influences the wear behavior of AlCoCrFeNi alloy, but seriously impacts the wear mechanism of AlCoCrFeNiTi0.5alloy. Compared with AlCoCrFeNi alloy, AlCoCrFeNiTi0.5alloy keeps better wear-resistance at low applied load of 100 N, but preserves less wear-resistance at high applied load of 200 N.