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| Chemical Polishing of Titanium Alloy Shaped by Laser Additive Manufacturing |
| LI Xiaodan1 , LI Jianzhong2 , NI Jiaqiang1 , ZHANG Yingwei1 |
| (1. AVIC Shenyang Aircraft Industrial (Group) Co., Ltd., Shenyang 110034, China; 2. School of Metallurgy, Northeastern University, Shenyang 110024, China) |
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Abstract The shaped Ti–6Al–4V alloy parts manufactured by laser additive technology were polished using HNO3- HF chemical solution. Influences of temperature and time on the polishing effects of titanium alloy were investigated by taking the surface roughness, thinning and weight loss as indicators. The electrochemical and mechanical properties of titanium alloys before and after chemical polishing were analyzed by the electrochemical measurement, tensile test and residual stress test. The results showed that favorable polishing effect of the titanium alloy was achieved at polishing conditions of 30°C and 10 minutes, and the surface roughness reduced and corrosion resistance improved. After chemical polished, the strength of titanium alloy decreased slightly, and the residual stress of samples transformed from the tensile stress to a compressive stress.
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2020, 
