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Shear deformation with imposed hydrostatic pressure for enhanced compaction of powder

journal contribution
posted on 2008-05-01, 00:00 authored by Rimma Lapovok, D Tomus, C Bettles
In this paper equal channel angular extrusion with back pressure was used to compact Ti-6Al-4V powder at 400 °C, achieving relative densities of 98.3-98.6% and green strengths up to 750 MPa. The novelty of the approach arises from the notion that severe shear deformation is an important factor for consolidation. Improved compaction is related to enhanced self-diffusion through the creation of additional diffusion paths (defects) and the imposed hydrostatic pressure. The role of deformation mechanisms in improving compaction is discussed. © 2008 Acta Materialia Inc.

History

Journal

Scripta materialia

Volume

58

Issue

10

Pagination

898 - 901

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

1359-6462

Language

eng

Publication classification

C Journal article; C1.1 Refereed article in a scholarly journal

Copyright notice

2008, Elsevier