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The effect of alloy composition on instabilities in the beta phase of titanium alloys

Zheng, Yufeng and Williams, Robert EA and Nag, Soumya and Banerjee, Rajarshi and Fraser, Hamish L and Banerjee, Dipankar (2015) The effect of alloy composition on instabilities in the beta phase of titanium alloys. In: SCRIPTA MATERIALIA, 116 . pp. 49-52.

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Official URL: http://dx.doi.org/10.1016/j.scriptamat.2016.01.024...


A metastable nano-scale disordered precipitate with orthorhombic symmetry has been identified using high resolution scanning transmission electron microscopy. The phase, termed O', is metastable, formed by a shuffle mechanism involving a {110}<1<(1)over bar>0> transverse phonon wave in samples of Ti-26Nb-2Zr (at.%) quenched from the beta phase. The addition of 2% Zr to Ti-26Nb appears to suppress significantly the stability of both the {11 (2) over bar}<111> shear and 2/3 <111> longitudinal phonon wave but promotes the {110}<1<(1)over bar>0> transverse shuffle. This results in the nano-size O' phase being homogeneously formed in the parent beta phase matrix rather than the massive alpha `' phase. (C) 2016 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Keywords: Titanium alloys; Phase transformations; High-resolution electron microscopy; Martensite
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 28 Apr 2016 05:15
Last Modified: 28 Apr 2016 05:15
URI: http://eprints.iisc.ac.in/id/eprint/53709

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