|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Biological Materials Science Symposium
||Microstructure and Tribological Behaviors of Laser Clad Ti-based Metallic Glass Composite Coatings
||Hong Wu, Xiaodong Lan, Xiongfei Zai, Yong Liu
|On-Site Speaker (Planned)
Wear resistant Ti-based composite coatings with the microstructure of nanocrystallines and ductile dendrites dispersed in the metallic glass matrix were fabricated on the substrates of Ti-30Nb-5Ta-7Zr (wt.%) by the laser cladding process using Ti45Cu41Ni9Zr5 and Ti44Cu40Ni8Zr5Sn3 (at.%) alloy powders. The effects of the precipitation of nanocrystallines and ductile dendrites on the tribological properties of the coatings have been systematically investigated. The microstructures of the coatings were characterized by X-ray diffractometry, energy dispersive X-ray spectrometry, scanning electron microscopy and transmission electron microscopy. The tribological behaviors of the laser clad Ti-based amorphous composite coatings were evaluated using ball-on-block dry sliding tests at room temperature. It was found that the hardness and toughness of the composite coatings can be improved when the nanocrystallines and ductile dendrites are homogeneously distributed in the metallic glass matrix. Only an optimized combination of hardness and toughness of the composite coating can lead to its good wear resistance.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)