Electrochemical behaviour of laser solid formed Ti-6Al-4V alloy in a highly concentrated NaCl solution

被引：89
作者：
Li, Jiaqiang [1 ,2 ]
Lin, Xin [1 ,2 ]
Guo, Pengfei [1 ,2 ]
Song, Menghua [1 ,2 ]
Huang, Weidong [1 ,2 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, 127 Youyixilu, Xian 710072, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, Key Lab Met High Performance Addit Mfg & Innovat, MIIT China, 127 Youyixilu, Xian 710072, Shannxi, Peoples R China
来源：
CORROSION SCIENCE | 2018年 / 142卷
基金：
中国国家自然科学基金;
关键词：
Titanium; Polarization; EIS; Anodic dissolution; Additive manufacturing (AM); COMMERCIALLY PURE TITANIUM; DIRECTED ENERGY DEPOSITION; CORROSION-RESISTANCE; MECHANICAL-PROPERTIES; DISSOLUTION BEHAVIOR; TI-13NB-13ZR ALLOY; ANODIC-DISSOLUTION; GRAIN-SIZE; TI; MICROSTRUCTURE;
D O I：
10.1016/j.corsci.2018.07.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Grain characteristics exhibit significant effects on electrochemical machining. The effects of the surface of grains on the electrochemical behaviour of laser solid formed Ti-6Al-4V deposits were investigated using a 15 wt.% NaCl solution. The epitaxial growth behaviour caused the deposits to generally exhibit columnar grains near the lateral surface and equiaxed-shape grains near the top surface. The coarser columnar grains presented inferior corrosion resistance, while the equiaxed grains exhibited slightly better corrosion resistance but distinctly poorer electrochemical machinability. The increase in the beta/alpha volume ratio of the grain decreased its corrosion resistance but increased the transpassive dissolution potential.
引用
收藏
页码：161 / 174
页数：14
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