Novel high strength titanium-titanium composites produced using field-assisted sintering technology (FAST)

SCRIPTA MATERIALIA

卷:159

Article

Calvert, E. L.¹  Knowles, A. J.²  Pope, J. J.¹  Dye, D.²  Jackson, M.¹ 

[1] Univ Sheffield, Dept Mat Sci & Engn, Mappin St, Sheffield S1 3JD, S Yorkshire, England

[2] Imperial Coll London, Royal Sch Mines, Dept Mat, Prince Consort Rd, London SW7 2BP, England

关键词: Titanium alloys;    Metal matrix composite;    Spark plasma sintering;    Phase transformations;    Omega;   

DOI  :  10.1016/j.scriptamat.2018.08.036

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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