An attempt was made to improve the surface properties of the AZ91 Mg alloy through surface alloying of a mixture of Al and TiC with the help of TIG arc as heat source.The microstructural evolution of the alloyed layer...An attempt was made to improve the surface properties of the AZ91 Mg alloy through surface alloying of a mixture of Al and TiC with the help of TIG arc as heat source.The microstructural evolution of the alloyed layer on the AZ91 alloy was analysed through SEM and XRD technique.The micro-hardness and the dry sliding wear behaviour were assessed by Vickers micro-hardness tester and pin-on-disc wear test setup,respectively.It is revealed that almost uniform alloyed layer forms on the AZ91 alloy substrate for a specific current and scan speed employed in the present experiments.The alloyed layer exhibits hardness value up to 305 HV0.25,and almost negligible wear as compared to the as-received AZ91 alloy substrate.展开更多
文摘An attempt was made to improve the surface properties of the AZ91 Mg alloy through surface alloying of a mixture of Al and TiC with the help of TIG arc as heat source.The microstructural evolution of the alloyed layer on the AZ91 alloy was analysed through SEM and XRD technique.The micro-hardness and the dry sliding wear behaviour were assessed by Vickers micro-hardness tester and pin-on-disc wear test setup,respectively.It is revealed that almost uniform alloyed layer forms on the AZ91 alloy substrate for a specific current and scan speed employed in the present experiments.The alloyed layer exhibits hardness value up to 305 HV0.25,and almost negligible wear as compared to the as-received AZ91 alloy substrate.
