A comparative study of surface characterization and corrosion behavior of micro-arc oxidation treated Ti–6Al–4V alloy prepared by SEBM and SLM
Qing-bo Yan1, Tong Xue2, Shi-feng Liu2, Wan-lin Wang3, Yan Wang2, Xi Song2, Xin Yang3, Wei-wei Shang4
1 Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China 2 School of Metallurgical and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China 3 School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, Shaanxi, China 4 Shaanxi Steel Group Industrial Innovation Research Institute Co., Ltd., Hanzhong 723000, Shaanxi, China
Abstract：Additively manufactured Ti–6Al–4V (TC4) parts have been successfully employed as artificial implants in dental and orthopedic surgery due to their excellent mechanical properties. However, the suboptimal corrosion resistance limits their applications. The surface characterization and corrosion behavior of micro-arc oxidation (MAO) treated TC4 alloy prepared by selective electron beam melting (SEBM) and selective laser melting (SLM) technologies were compared. The corrosion resistance mechanism of SLM-MAO and SEBM-MAO was clarified through the analysis of the microstructure evolution, surface morphology, and electrochemical experiments. The results show that the anatase-type TiO2 is partially transformed into the slankite phase after MAO treatment. The surface roughness of SEBM sample was reduced by MAO coating, while the surface roughness of SLM sample increased after MAO, which is related to the difference between the microstructure of the deposited samples caused by different additive manufacturing technologies. When MAO time was 15 min, SLM-MAO and SEBM-MAO coating displayed the best and the worst corrosion resistance, respectively.
Qing-bo Yan,Tong Xue,Shi-feng Liu, et al. A comparative study of surface characterization and corrosion behavior of micro-arc oxidation treated Ti–6Al–4V alloy prepared by SEBM and SLM[J]. Journal of Iron and Steel Research International, 2023, 30(1): 165-175.
2023, Vol. 30 
