Face-centered-cubic high-entropy alloys have excellent ductility and great potential for engineering applications.However,few studies have reported on the wear behavior under different loads.This study aimed to invest...Face-centered-cubic high-entropy alloys have excellent ductility and great potential for engineering applications.However,few studies have reported on the wear behavior under different loads.This study aimed to investigate the tribological behavior of CoCrFeNi highentropy alloy under different loads.The wear rate increased with the load,and the main wear behavior was abrasive wear.The cross-sectional microstructure of worn surface consisted of oxide,nanocrystalline,nanolaminated,and deformation layers.Under the higher loads,the deformation mechanism included dislocation slip and deformation twins,and shear bands also appeared.It was unexpectedly found that the wear rate increased sharply under high load,which was attributed to the formation of shear bands and microcracks in the nanocrystalline layer.The results successfully revealed the great influence of microstructure evolution on the wear rate,providing theoretical guidance for improving the wear resistance of face-centered-cubic high-entropy alloys in the future.展开更多
基金financially supported by the National Key Research and Development Program of China (Nos.2019YFA0209901 and 2018YFA0702901)the National Natural Science Foundation of China (No.U20A20278)+1 种基金Liao Ning Revitalization Talents Program (No.XLYC1807047)Major Special Project of“Scientific and Technological Innovation 2025”in Ningbo (No.2019B10086)。
文摘Face-centered-cubic high-entropy alloys have excellent ductility and great potential for engineering applications.However,few studies have reported on the wear behavior under different loads.This study aimed to investigate the tribological behavior of CoCrFeNi highentropy alloy under different loads.The wear rate increased with the load,and the main wear behavior was abrasive wear.The cross-sectional microstructure of worn surface consisted of oxide,nanocrystalline,nanolaminated,and deformation layers.Under the higher loads,the deformation mechanism included dislocation slip and deformation twins,and shear bands also appeared.It was unexpectedly found that the wear rate increased sharply under high load,which was attributed to the formation of shear bands and microcracks in the nanocrystalline layer.The results successfully revealed the great influence of microstructure evolution on the wear rate,providing theoretical guidance for improving the wear resistance of face-centered-cubic high-entropy alloys in the future.
