Bulk Al materials from back pressure equal channel angular consolidation of mechanically milled particles

Kubota, Masahiro, Wu, Xiaolin, Xu, Wei and Xia, Kenong 2008, Bulk Al materials from back pressure equal channel angular consolidation of mechanically milled particles, in Materials Science Forum, TRANS TECH PUBLICATIONS LTD,, pp. 428-433, doi: 10.4028/www.scientific.net/msf.584-586.428.

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Title Bulk Al materials from back pressure equal channel angular consolidation of mechanically milled particles
Author(s) Kubota, Masahiro
Wu, Xiaolin
Xu, WeiORCID iD for Xu, Wei orcid.org/0000-0002-7048-7972
Xia, Kenong
Conference name 4th International Conference on Nanomaterials by Severe Plastic Deformation
Conference location Goslar, GERMANY
Conference dates 2008/08/18 - 2008/08/22
Title of proceedings Materials Science Forum
Editor(s) Estrin, Y
Maier, HJ
Publication date 2008
Series Materials Science Forum
Start page 428
End page 433
Total pages 6
Keyword(s) Science & Technology
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Materials Science, Characterization & Testing
Science & Technology - Other Topics
Materials Science
severe plastic deformation
mechanical milling
powder consolidation
composite materials
pure aluminium
Summary Mechanically milled pure aluminium powders were fabricated into bulk materials usingback pressure equal channel angular consolidation (BP-ECAC) for four or eight passes at 373K. Thebulk materials consolidated from 0 h and 4 h mechanically milled powders were characterised byVickers hardness tests and density measurements. Thermal stability of the consolidated bulkmaterials was evaluated by isothermal heat treatments at 673K. The as-consolidated bulk materialfrom the 0 h milled (i.e. unmilled) powder showed nearly full density. However, full density was notobtained with the 4 h milled powder even after eight passes. The HV values for the as-consolidatedmaterials fabricated from the 0 h and 4 h milled powders after four passes and from the 4 h milledpowder after eight passes were 57, 121 and 136, respectively. Softening was observed in the bulkmaterial consolidated from the 0 h milled powder during the isothermal heat treatment. However, thehardness of the bulk materials consolidated from the 4 h milled powders after four and eight passesincreased to maximum values of 137 and 141 after heat treatment for 28 h and 8 h at 673K,respectively. The maximum hardness was maintained for up to 100 h at 673K in both materials. Thehardening and thermal stability in the bulk materials from the milled powders are attributable todispersion strengthening of Al4C3 particles formed by solid-state reaction during the isothermal heattreatment.
ISBN 978-0-87849-360-9
ISSN 0255-5476
Language eng
DOI 10.4028/www.scientific.net/msf.584-586.428
Indigenous content off
Field of Research 0306 Physical Chemistry (incl. Structural)
0912 Materials Engineering
HERDC Research category E1.1 Full written paper - refereed
Persistent URL http://hdl.handle.net/10536/DRO/DU:30125691

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