Journal
SCRIPTA MATERIALIA
Volume 159, Issue -, Pages 51-57Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.08.036
Keywords
Titanium alloys; Metal matrix composite; Spark plasma sintering; Phase transformations; Omega
Categories
Funding
- EPSRC Doctoral Training Account
- Design of Alloys for Resource Efficiency (DARE) programme [EP/L0253/1]
- EPSRC [EP/L025213/1] Funding Source: UKRI
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To increase the strength of titanium alloys beyond that achievable with alpha-beta microstructures, alternative reinforcing methods are necessary. Here, field-assisted sintering technology (FAST) has been used to produce a novel Ti-5Al-5Mo-5V-3Cr (Ti-5553) metal-matrix-composite (MMC) reinforced with 0-25 wt.% of a similar to 2 GPa yield strength TiFeMo alloy strengthened by ordered body-centred cubic intermetallic and to phases. The interdiffusion region between Ti-5553 and TiFeMo particles was studied by modelling, electron microscopy, and nanoindentation to examine the effect of graded composition on mechanical properties and formation of a, intermetallic, and omega phases, which resulted in a >200 MPa strengthening benefit over unreinforced Ti-5553. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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