Ti-6Al-4V billet produced by compaction of BE powders using equal-channel angular pressing

Christian Haase, Hoi-Pang Ng, Rimma Ye Lapovok, Yuri Estrin

Research output: Chapter in Book/Report/Conference proceedingConference PaperOtherpeer-review

2 Citations (Scopus)

Abstract

In the present study, ECAP compaction was used to produce Ti-6Al-4V billet from CP Ti powder mixed with two different Al-V master alloys. It was demonstrated that ECAP at 400 ?C with applied back-pressure of about 210 MPa permits consolidation of the powder mixtures to relative green densities as high as 99.3 . A combination of temperature, high hydrostatic pressure and plastic shear deformation gave rise to excellent green densities and good compositional homogeneity due to enhanced self-diffusion. It was shown that the temperature of sintering required after direct compaction of BE powders can be reduced by 150-250?C if compaction is conducted by ECAP with back-pressure. This becomes possible due to high green density and the presence of a large number of fast diffusion paths associated with dislocations and grain boundaries. It is suggested that the ECAP-based processing route may offer a significant saving of production cost.
Original languageEnglish
Title of host publicationKey Engineering Materials
EditorsMa Qian
Place of PublicationSwitzerland
PublisherTrans Tech Publications
Pages301 - 308
Number of pages8
Volume520
ISBN (Print)1013-9826
DOIs
Publication statusPublished - 2012
EventInternational Conference on Powder Processing, Consolidation and Metallurgy of Titanium 2012 - Brisbane, Australia
Duration: 1 Jan 2012 → …

Conference

ConferenceInternational Conference on Powder Processing, Consolidation and Metallurgy of Titanium 2012
CountryAustralia
CityBrisbane
Period1/01/12 → …

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