A new beta titanium alloy system reinforced with superlattice intermetallic precipitates

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Title: A new beta titanium alloy system reinforced with superlattice intermetallic precipitates
Author(s): Knowles, AJ
Jun, T-S
Bhowmik, A
Jones, NG
Giuliani, F
Britton, TB
Stone, HJ
Dye, D
Item Type: Journal Article
Abstract: Titanium alloys traditionally lack a nm-scale intermetallic precipitate that can be exploited for age-hardening from solid solution. Here such a strengthening concept is developed in the Ti-Fe-Mo system, with it being found that a high temperature β (bcc A2) single-phase field for homogenisation can be obtained, which following ageing (750 °C/80 h) precipitated B2 TiFe <100 nm in size. The orientation relationship was found to be ⟨100⟩A2//⟨100⟩B2, {100}A2//{100}B2, with a misfit of −6.1%. The alloy was found to be very hard (HV0.5 = 6.4 GPa) and strong (σy, 0.2 = 1.9 GPa) with a density of 6.68 g cm−3. TEM observation and micropillar deformation showed that the precipitates resist dislocation cutting.
Publication Date: 14-Jul-2017
Date of Acceptance: 21-Jun-2017
URI: http://hdl.handle.net/10044/1/49608
DOI: https://dx.doi.org/10.1016/j.scriptamat.2017.06.038
ISSN: 1872-8456
Publisher: Elsevier
Start Page: 71
End Page: 75
Journal / Book Title: Scripta Materialia
Volume: 140
Copyright Statement: Crown Copyright © 2017 Published by Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (E
Royal Academy Of Engineering
Shell Global Solutions International BV
Engineering & Physical Science Research Council (E
Funder's Grant Number: RG75356
138874
RF/129
PT61050 / PO4550133349
N/A
Keywords: 0912 Materials Engineering
0913 Mechanical Engineering
Materials
Publication Status: Published
Appears in Collections:Faculty of Engineering
Mechanical Engineering
Materials
Faculty of Natural Sciences



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