标题：A study on wear resistance and microcrack of the Ti_3Al/TiAl+TiC ceramic layer deposited by laser cladding on Ti-6A1-4V alloy
作者：Jianing Li;Chuanzhong Chen;Tiziano Squartini;Qingshan He
作者机构：[Li, J] Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Department of Materials Science, Shandong University, Jing S 更多
通讯作者地址：[Li, JN]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Dept Mat Sci, Jing Shi Rd 17923, Jinan 250061, Shandong, Peoples R 更多
来源：Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials
关键词：titanium alloys;surfaces;microcrack;wear resistance;microstructure
摘要：Laser cladding of the Al + TiC alloy powder on Ti-6A1-4V alloy can form the Ti_3Al/TiAl + TiC ceramic layer. In this study. TiC particle-dispersed Ti_3Al/TiAl matrix ceramic layer on the Ti-6AI-4V alloy by laser cladding has been researched by means of X-ray diffraction, scanning electron microscope, electron probe micro-analyzer, energy dispersive spectrometer. The main difference from the earlier reports is that Ti_3Al/TiAl has been chosen as the matrix of the composite coating. The wear resistance of the Al + 30 wt.% TiC and the Al + 40 wt.% TiC cladding layer was approximately 2 times greater than that of the Ti-6A1-4V substrate due to the reinforcement of the Ti_3 Al/TiAl+TiC hard phases. However, when the TiC mass percent was above 40 wt.%, the thermal stress value was greater than the materials yield strength limit in the ceramic layer, the microcrack was present and its wear resistance decreased.