材料科学
研磨
选择性激光熔化
表面粗糙度
复合材料
表面光洁度
表面改性
钛
冶金
微观结构
机械工程
工程类
作者
Guowen Qiao,Bi Zhang,Sai Guo,Qian Bai,Quanwei Sun,Yingwei Zhang
标识
DOI:10.1016/j.jmapro.2023.04.064
摘要
TiC-reinforced titanium matrix composites (TMCs) are typically difficult-to-machine materials. It is prospective to combine the advantages of selective laser melting (SLM) and high-speed grinding to manufacture TMCs parts. This study investigates the surface morphology in high-speed grinding of TMCs fabricated by SLM. Grinding experiments with 28.75–232.66 m/s are conducted. Two surface features are found in the ground surface of TMCs, i.e. smearing at low grinding speeds and scratch at high grinding speeds. Surface morphologies are evaluated based on fractal dimension FD and surface roughness Ra. The results show that the correlations between FD and Ra indicate the ground surface formation mechanisms of TMCs. It is found that submicron TiC generated in SLM cooperating with high grinding speed achieves a good surface quality in terms of reduced surface roughness and subsurface damages for TMCs, which could be beneficial to the fabrication of other metal matrix composites.
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