On variant distribution and coarsening behavior of the a phase in a metastable beta titanium alloy

Balachandran, Shanoob and Kashiwar, Ankush and Choudhury, Abhik and Banerjee, Dipankar and Shi, Rongpei and Wang, Yunzhi (2016) On variant distribution and coarsening behavior of the a phase in a metastable beta titanium alloy. In: ACTA MATERIALIA, 106 . pp. 374-387.

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Abstract

The stereology, variant distribution and coarsening behavior of semicoherent alpha(hcp) precipitates in a beta(bcc) matrix of a Ti5553 alloy has been analyzed, and a dominant 3-variant cluster has been observed in which the variants are related to each other by an axis-angle pair <<11(2)over bar> 0 >/60 degrees. Shape and spatial distribution independent elastic self and interaction energies for all pairwise and triplet combinations of a have been calculated and it is found that the 3-cluster combination that is experimentally observed most frequently has the lowest energy for the semicoherent state. The coarsening behavior of the delta distribution follows LSW kinetics after an initial transient, and has been modeled by phase field methods. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	ACTA MATERIALIA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
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; Variant selection; Self-accommodation; Coarsening
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	07 Apr 2016 06:37
Last Modified:	07 Apr 2016 06:37
URI:	http://eprints.iisc.ac.in/id/eprint/53614

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