Microstructure Evolution, Mechanical Properties, and Corrosion Resistance of Hot Rolled and Annealed Ti-Mo-Ni Alloy

• Published in: Metals (Basel ) Vol. 13; no. 3; p. 566
• Main Authors: Liu, Kaiyuan, Zhang, Hongyu, Xiu, Mingkai, Huang, Zhirong, Huang, Haiguang, Xu, Yaoping, Zhou, Rongfeng, Xiao, Han
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.03.2023
• Subjects: Annealing; Corrosion and anti-corrosives; Corrosion effects; Corrosion resistance; Elongation; Furnaces; Grain boundaries; Grain size; Heat resistance; Hot rolling; Hydrochloric acid; Intergranular corrosion; Mechanical properties; Metal sheets; Metallurgy; Microstructure; microstructure evolution; Molybdenum base alloys; Phase transitions; Reaction kinetics; Specialty metals industry; Titanium; titanium alloy; Titanium alloys; Titanium base alloys
• ISSN: 2075-4701; 2075-4701
• DOI: 10.3390/met13030566

The effects of annealing time on microstructure, mechanical properties, and corrosion resistance of Ti-0.3Mo-0.8Ni (TA10) titanium alloy hot-rolled sheets are investigated. With the increase in annealing time, the α → β phase transition occurs, and the grain size grows gradually. The strength deteriorates, and elongation increases. The grains grow up, the number of grain boundaries decreases, and intergranular corrosion decreases. With the increase in the annealing time, the corrosion kinetics and thermodynamics are enhanced. When annealed at 780 °C for 2 h, TA10 alloy sheets exhibit the best comprehensive properties, and its microstructure is composed of fine equiaxed α phase. The mechanical properties and corrosion resistance are improved.