Original title: Microstructure and mechanical properties of powder aluminium prepared by severe plastic deformation
Authors: Dvořák, Jiří ; Král, Petr ; Balog, M. ; Simančík, F. ; Sklenička, Václav
Document type: Papers
Conference/Event: Metal 2010. International Conference on Metallurgy and Materials /19./, Rožnov pod Radhoštěm (CZ), 2010-05-18 / 2010-05-20
Year: 2010
Language: eng
Abstract: This paper describes properties of Al 99.7% produced by PM. Powder green were prepared via CIP. The prepared powder about size less than 400 µm was compacted via conventional direct hot-extrusion (DE) at temperature of 450°C. Some extruded material was additionally processed by ECAP. The microstructural investigations were performed using OM and SEM equipped with EBSD unit. Examination of extruded powder compacts showed that during DE initial powder particles deformed into grains about size of 5 m. This material was further subjected to ECAP passes. The mechanical properties of this material were investigated using hardness measurements. In addition, creep tests in tension were conducted at temperature of 473 K and at the different applied stresses. The basic aim of this work is microstructure characterization and description of creep behaviour of powder aluminium prepared by DE. The further aim of this work is the evaluation of ECAP technique effect on mechanical properties of powder Al.
Keywords: CREEP; ECAP; powder aluminium; UFG
Project no.: CEZ:AV0Z20410507 (CEP), KJB200410801 (CEP)
Funding provider: GA AV ČR
Host item entry: METAL 2010. Conference proceedings, ISBN 978-80-87294-15-4

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0190231

Permalink: http://www.nusl.cz/ntk/nusl-42064


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