The role of initial α-phase orientation on tensile and strain hardening behavior of Ti-6Al-4V alloy. (December 2017)

• Record Type: Journal Article
• Authors: Ahmadian, P.; Abbasi, S.M.; Morakabati, M.
• Is Part Of: Materials today communications. Volume 13(2017)
• Page Start: 332
• Page End: 345
• Publication Date: 2017-12
• Subjects: Ti6Al4V -- Microstructure -- Texture -- Strain hardening -- Initial orientation -- Hard/soft grain; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2017.10.018
• Languages: English
• ISSNs: 2352-4928

Abstract

Graphical abstract: Abstract: The effect of initial α-phase orientation on mechanical properties and strain hardening behavior of Ti-6Al–4 V alloy was investigated. Two samples have been unidirectional rolled at 950 and 800 °C. Third sample was cross rolled at 800 °C. subsequently all the samples were annealed at 960 °C for 1 h and slowly cooled at furnace to obtain fully equiaxed microstructure with different initial texture. Strain hardening behavior of samples was calculated by phenomenological Kocks-Mecking approach ( θ = d σ d ε / G v s ε p ). Results showed that during plastic deformation, prismatic texture resulted in low value in yield stress and excellent work hardening capacity. With decreasing in unidirectional rolling temperature from 950 to 800 °C, anisotropy in yield stress and work hardening capacity is increased as a result of basal and prismatic texture while ductility has not been significantly influenced. In the case of cross rolling, anisotropy is significantly mitigated as a result of basal texture augmentation while ductility is decreased which is related to hard grain adjacent to soft one.