Effect of heat treatment on microstructure and corrosion behavior of Ti6Al4V fabricated by laser beam powder bed fusion. (December 2022)

• Record Type: Journal Article
• Authors: Zhang, Hongwei; Qin, Wentao; Man, Cheng; Cui, Hongzhi; Kong, Decheng; Cui, Zhongyu; Wang, Xin; Dong, Chaofang
• Is Part Of: Corrosion science. Volume 209(2022)
• Publication Date: 2022-12
• Subjects: Heat treatment -- Titanium alloys -- Corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110789
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: The effect of the heat treatments on the microstructure and corrosion behavior of PBF-LB Ti6Al4V is investigated. The different evolution processes including precipitation of the supersaturated V, decomposition of α' phase, formation of β phase, and recrystallization take place when the PBF-LB Ti6Al4V is treated at temperatures from 320 °C to 1020 °C. The electrochemical measurement illustrates that the existence of the galvanic effect between α and β phases deteriorates the corrosion resistance of PBF-LB Ti6Al4V in artificial saliva with 0–0.2 M NaF, while the opposite result is obtained in the case of 0.5 M NaF. Highlights: The thermodynamics and kinetics processes of microstructure evolution of PBF-LB Ti6Al4V during heat treatment are concluded. The opposite corrosion behavior of PBF-LB Ti6Al4V in the solution with 0 – 0.2 M, 0.5 M NaF is investigated. The relationship between microstructure and corrosion behavior is analyzed.