Strengthening strategy for a ductile metastable β-titanium alloy using low-temperature aging. Issue 8 (15th November 2017)

• Record Type: Journal Article
• Authors: Sun, F.; Zhang, J. Y.; Vermaut, P.; Choudhuri, D.; Alam, T.; Mantri, S. A.; Svec, P.; Gloriant, T.; Jacques, P. J.; Banerjee, R.; Prima, F.
• Is Part Of: Materials research letters. Volume 5:Issue 8(2017)
• Page Start: 547
• Page End: 553
• Publication Date: 2017-11-15
• Subjects: β titanium alloys -- thermal treatment -- omega phase -- mechanical properties; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2017.1350211
• Languages: English
• ISSNs: 2166-3831

Abstract

ABSTRACT: While ω precipitates in metastable β titanium alloys are typically considered embrittling and consequently deleterious to the mechanical properties, this paper demonstrates that low-temperature aging (LTA) treatments for short time periods can in fact enhance the yield strength while preserving substantial elongation-to-failure in ω containing β titanium alloys. LTA treatments, carried out on a ductile β metastable Ti–12Mo alloy, significantly improve the yield strength of the material (∼55% increase as compared to solution-treated samples) while keeping both TRIP/TWIP effects and a large elongation-to-failure ( ϵ = 0.4 in true strain), resulting in a balance of mechanical properties. IMPACT STATEMENT Employing a novel low-temperature annealing strategy, omega precipitates, typically considered embrittling in beta titanium alloys, can effectively increase the yield strength by 50% while preserving 40% tensile ductility. GRAPHICAL ABSTRACT: