A nano-scale instability in the β phase of dilute Ti–Mo alloys. (15th April 2016)

• Record Type: Journal Article
• Authors: Zheng, Yufeng; Banerjee, Dipankar; Fraser, Hamish L.
• Is Part Of: Scripta materialia. Volume 116(2016)
• Page Start: 131
• Page End: 134
• Publication Date: 2016-04-15
• Subjects: Titanium alloys -- Phase transformations -- High-resolution electron microscopy -- Nano-scale instability -- O′ phase; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.01.044
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A nano-scale instability in the β phase resulting in the formation of the disordered orthorhombic O′ phase has been discovered in a fairly dilute binary Ti–Mo alloy, using selected area electron diffraction and high resolution scanning transmission electron microscopy. The O′ phase is formed in the alloy when the Mo content exceeds a critical value. The instability occurs in β-solutionized samples that have been quenched to room temperature and is found to co-exist with athermal ω phase. Interestingly, this nano-scale instability, involving the 110 < 1 1 ¯ 0 > soft-phonon shuffle, occurs in the β phase without deliberate additions of either interstitial or substitutional solutes. Graphical abstract: