摘要
The tribological properties of AICoCrFeNi and AICoCrFeNiTi0.5 high entropy alloys under gear oil and multiply alkylated cyclopentanes （MACs） lubrication condition have been studied. The equiaxed crystal structure of AICoCrFeNi alloy is obtained after heat-treatment. The AlCoCrFeNiTi0.5 alloy keeps dendrite structure. Under the gear oil with good lubrication action, AlCoCrFeNiTi0.5 alloy preserves better tribological properties than AICoCrFeNi alloy. The delamination and crack behaviors tend to occur in the grain boundary of AICoCrFeNi alloy and along the interdendrite region of AICoCrFeNiTi0.5 alloy. Under the MACs with relatively poor lubrication action, the applied load slightly influences the wear behavior of AICoCrFeNi alloy, but seriously impacts the wear mechanism of AlCoCrFeNiTi0.5 alloy. Compared with AlCoCrFeNi alloy, AlCoCrFeNiTi0.5 alloy keeps better wear-resistance at low applied load of 100 N, but preserves less wearresistance at high applied load of 200 N.
The tribological properties of AICoCrFeNi and AICoCrFeNiTi0.5 high entropy alloys under gear oil and multiply alkylated cyclopentanes （MACs） lubrication condition have been studied. The equiaxed crystal structure of AICoCrFeNi alloy is obtained after heat-treatment. The AlCoCrFeNiTi0.5 alloy keeps dendrite structure. Under the gear oil with good lubrication action, AlCoCrFeNiTi0.5 alloy preserves better tribological properties than AICoCrFeNi alloy. The delamination and crack behaviors tend to occur in the grain boundary of AICoCrFeNi alloy and along the interdendrite region of AICoCrFeNiTi0.5 alloy. Under the MACs with relatively poor lubrication action, the applied load slightly influences the wear behavior of AICoCrFeNi alloy, but seriously impacts the wear mechanism of AlCoCrFeNiTi0.5 alloy. Compared with AlCoCrFeNi alloy, AlCoCrFeNiTi0.5 alloy keeps better wear-resistance at low applied load of 100 N, but preserves less wearresistance at high applied load of 200 N.
基金
the financial support from the National Natural Science Foundation of China(No.51271151)
the Program of Introducing Talents of Discipline to Universities(No.B08040)
