Microhardness and corrosion resistance behaviour of Ti–6Al–4V alloy-coloured surface under WEDM-HS process

Micro & nano letters

article

Linshuai Zhang¹  Jinkai Xu¹  Bingyan Chen²  Huadong Yu¹  Zhongxu Lian¹ 

[1] National–Local Joint Engineering Laboratory of Precision Manufacturing and Measurement Technology, Changchun University of Science and Technology;China North Industries Group Corporation, China North Vehicle Research Institute

关键词: microhardness;    corrosion resistance;    electrical discharge machining;    nanoindentation;    hardness testing;    electrochemical impedance spectroscopy;    thin films;    current density;    surface treatment;    titanium alloys;    aluminium alloys;    vanadium alloys;    TiAlV;    titanium alloys;    surface modihcation;    corrosion current density;    electrochemical impedance spectroscopy;    potentiodynamic polarisation;    nanoindentation tester;    high-speed wire electrical discharge machining technology;    reaction films;    WEDM-HS process;    alloy-coloured surface;    corrosion resistance;    microhardness;   

DOI  :  10.1049/mnl.2017.0037

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

In this work, the reaction films were generated on the Ti–6Al–4V alloy by means of high-speed wire electrical discharge machining (WEDM-HS) technology in order to improve its microhardness and corrosion resistance. The microhardness was evaluated by using a nanoindentation tester. The corrosion behaviour was studied using measurements of potentiodynamic polarisation and electrochemical impedance spectroscopy. The experimental results showed that the processed alloys presented a higher microhardness than the matrix, and the thicker film on the surface had a greater microhardness. Additionally, the corrosion resistances of the processed alloys were superior, which could have been due to the lower corrosion current densities and the higher impedance values. Furthermore, the corrosion current densities of the processed alloys would decrease with thicker reaction films. This research provides important insights into the surface modification of titanium alloys.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND