Mechanism and kinetics of static globularization in TA15 titanium alloy with transformed structure

• Published in: Journal of alloys and compounds 2012-08, Vol.533, p.1-8
• Main Authors: Fan, X.G., Yang, H., Yan, S.L., Gao, P.F., Zhou, J.H.
• Format: Article
• Language: English
• Subjects: Alloys; Annealing; Asymptotic properties; Boundaries; Coarsening; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Heat treatment; Materials science; Mathematical analysis; Microstructure evolution; Other heat and thermomechanical treatments; Physics; Splitting; Static globularization; TA15 titanium alloy; Titanium base alloys; Treatment of materials and its effects on microstructure and properties
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2012.03.113

► Boundary splitting and microstructure coarsening are two competing mechanisms for static globularization. ► Static globularization kinetics is found to increase with annealing temperature and prestrain, but to be less dependent on strain rate ► The asymptotic equation can be used to model the static globularization kinetics. The static globularization behavior and mechanism of transformed structure during heat-treatment of hot worked TA15 alloy were investigated. It is found that boundary splitting and microstructure coarsening are two competing mechanisms for static globularization. Boundary splitting is significant in the initial stage of annealing while coarsening occurs throughout the annealing process. Static globularization kinetics increases with annealing temperature and prestrain, but is independent on strain rate. The rate of static globularization kinetics decreases with annealing time. The asymptotic equation can be used to model the static globularization kinetics.