The role of the ω phase on the non-classical precipitation of the α phase in metastable β-titanium alloys. (15th January 2016)

• Record Type: Journal Article
• Authors: Zheng, Yufeng; Williams, Robert E.A.; Sosa, John M.; Wang, Yunzhi; Banerjee, Rajarshi; Fraser, Hamish L.
• Is Part Of: Scripta materialia. Volume 111(2016)
• Page Start: 81
• Page End: 84
• Publication Date: 2016-01-15
• Subjects: Titanium alloys -- Phase transformations -- Nucleation -- HREM; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.08.019
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract: The metastable β-Ti alloy, Ti-5553, has been heat-treated to permit a determination of the role of the ω phase on non-classical precipitation of the α phase. Thus, samples containing the athermal ω phase have been up-quenched to 600°C. The observations made are consistent with the activation of the non-classical, pseudo-spinodal, nucleation mechanism, with the ω phase playing essentially no direct role. The α/β interfacial structures have been shown to exhibit significant degrees of coherency compared with those in conventional α/β alloys, and implications of this on lowering the interfacial energy, and so the activation for nucleation, are discussed.