Novel high strength titanium-titanium composites produced using field-assisted sintering technology (FAST). (15th January 2019)

• Record Type: Journal Article
• Authors: Calvert, E.L.; Knowles, A.J.; Pope, J.J.; Dye, D.; Jackson, M.
• Is Part Of: Scripta materialia. Number 159(2019)
• Page Start: 51
• Page End: 57
• Publication Date: 2019-01-15
• Subjects: Titanium alloys -- Metal matrix composite -- Spark plasma sintering -- Phase transformations -- Omega; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.08.036
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: To increase the strength of titanium alloys beyond that achievable with α - β 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 ∼2 GPa yield strength TiFeMo alloy strengthened by ordered body-centred cubic intermetallic and ω 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 α, intermetallic, and ω phases, which resulted in a > 200 MPa strengthening benefit over unreinforced Ti-5553. Graphical Abstract: