The fretting wear behavior of plasma spraying CoCrW and Cr3C2-NiCr coatings were investigated. The results showed both plasma spraying coatings were inferior to K417 nickel superalloy in the fretting wear resistance. ...The fretting wear behavior of plasma spraying CoCrW and Cr3C2-NiCr coatings were investigated. The results showed both plasma spraying coatings were inferior to K417 nickel superalloy in the fretting wear resistance. The characterized fatigue delamination of the plasma sprayed coatings was evidently different from that of the homogeneous materials. The lamellar cohesion, oxide inclusions and porosity were critical factors that controlled the fretting wear resistance. In the view of contact mechanics, the fretting wear behavior of plasma spraying coatings was characterized.展开更多
Heat treatment on the laser powder synthesized Ni20A130Fe intermetallic alloy was conducted. The microstructure and composition were analyzed by scanning electron microscopy. The results showed that heat treatment cou...Heat treatment on the laser powder synthesized Ni20A130Fe intermetallic alloy was conducted. The microstructure and composition were analyzed by scanning electron microscopy. The results showed that heat treatment could promote the precipitation of the ductile phase and the coalescence and growth of the sub-crystal grains. These were desirable to improve the ambient ductility and the elevated-temperature strength of the Ni20A130Feintermetallic alloy.展开更多
文摘The fretting wear behavior of plasma spraying CoCrW and Cr3C2-NiCr coatings were investigated. The results showed both plasma spraying coatings were inferior to K417 nickel superalloy in the fretting wear resistance. The characterized fatigue delamination of the plasma sprayed coatings was evidently different from that of the homogeneous materials. The lamellar cohesion, oxide inclusions and porosity were critical factors that controlled the fretting wear resistance. In the view of contact mechanics, the fretting wear behavior of plasma spraying coatings was characterized.
基金granted by the National Postdoctoral Science Foundation of ChinaResearch Foundation of Key Laboratory of High Energy Density Beam Processing Technology of China
文摘Heat treatment on the laser powder synthesized Ni20A130Fe intermetallic alloy was conducted. The microstructure and composition were analyzed by scanning electron microscopy. The results showed that heat treatment could promote the precipitation of the ductile phase and the coalescence and growth of the sub-crystal grains. These were desirable to improve the ambient ductility and the elevated-temperature strength of the Ni20A130Feintermetallic alloy.
