Characterization of Hypereutectoid Ti6Al4V–Cu Alloys Fabricated Using Electron Beam Additive Manufacturing

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发表日期：

2024年1月5日

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Aleksandra Nikolaeva,
Anna Zykova,
Andrey Chumaevskii,
Andrey Vorontsov,
Evgeny Knyazhev,
Evgeny Moskvichev,
Denis Gurianov,
Veronika Utyaganova,
Nikolai Savchenko,
Sergei Tarasov

摘要

Abstract

Hypereutectoid Ti6Al4V–Cu alloys containing 15, 19 and 25 wt% Cu were obtained using wire-feed electron beam additive manufacturing. Microstructures of alloys with 15 and 19 wt% Cu were composed of eutectoid Widmanstatten and allotriomorphic Ti₂Cu grains with α(α′)-Ti phases. The tensile strength and wear resistance improved as compared to that of additively manufactured Ti6Al4V. Alloy with 25 wt% Cu additionally contained coarse primary Ti₂Cu grains, which greatly reduced its ductility. Mechanical strength and wear resistance of the alloys degraded with the amount of Ti₂Cu because of embrittlement. Generation of tribological layer composed of oxides of metals belonging to the alloy and the steel counterbody served to wear reduction on the alloy with 15 wt% Cu as a result of tribological adaptability.

Graphical abstract