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

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 → …

Cite this

Haase, C., Ng, H-P., Lapovok, R. Y., & Estrin, Y. (2012). Ti-6Al-4V billet produced by compaction of BE powders using equal-channel angular pressing. In M. Qian (Ed.), Key Engineering Materials (Vol. 520, pp. 301 - 308). Switzerland: Trans Tech Publications. https://doi.org/10.4028/www.scientific.net/KEM.520.301
Haase, Christian ; Ng, Hoi-Pang ; Lapovok, Rimma Ye ; Estrin, Yuri. / Ti-6Al-4V billet produced by compaction of BE powders using equal-channel angular pressing. Key Engineering Materials. editor / Ma Qian. Vol. 520 Switzerland : Trans Tech Publications, 2012. pp. 301 - 308
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Haase, C, Ng, H-P, Lapovok, RY & Estrin, Y 2012, Ti-6Al-4V billet produced by compaction of BE powders using equal-channel angular pressing. in M Qian (ed.), Key Engineering Materials. vol. 520, Trans Tech Publications, Switzerland, pp. 301 - 308, International Conference on Powder Processing, Consolidation and Metallurgy of Titanium 2012, Brisbane, Australia, 1/01/12. https://doi.org/10.4028/www.scientific.net/KEM.520.301

Ti-6Al-4V billet produced by compaction of BE powders using equal-channel angular pressing. / Haase, Christian; Ng, Hoi-Pang; Lapovok, Rimma Ye; Estrin, Yuri.

Key Engineering Materials. ed. / Ma Qian. Vol. 520 Switzerland : Trans Tech Publications, 2012. p. 301 - 308.

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

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AB - 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.

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Haase C, Ng H-P, Lapovok RY, Estrin Y. Ti-6Al-4V billet produced by compaction of BE powders using equal-channel angular pressing. In Qian M, editor, Key Engineering Materials. Vol. 520. Switzerland: Trans Tech Publications. 2012. p. 301 - 308 https://doi.org/10.4028/www.scientific.net/KEM.520.301