File(s) under permanent embargo
Enhanced superplasticity of magnesium alloy AZ31 obtained through equal-channel angular pressing with back-pressure
journal contribution
posted on 2008-12-01, 00:00 authored by Rimma LapovokRimma Lapovok, Y Estrin, M V Popov, S Rundell, T WilliamsExcellent superplastic elongations (in excess of 1,200%) were achieved in a commercial cast AZ31 alloy processed by low temperature equal-channel angular pressing (ECAP) with a back-pressure to produce a bimodal grain structure. In contrast, AZ31 alloy processed by ECAP at temperatures higher than 200 °C showed a reasonably uniform grain structure and relatively low ductility. It is suggested that a bimodal grain structure is advantageous because the larger grains contribute to strain hardening thus delaying the onset of necking, while grain boundary sliding associated with small grains provides a stabilizing effect due to enhanced strain rate sensitivity. © 2008 Springer Science+Business Media, LLC.
History
Journal
Journal of materials scienceVolume
43Pagination
7372 - 7378Publisher
SpringerLocation
Berlin, GermanyPublisher DOI
ISSN
0022-2461eISSN
1573-4803Language
engPublication classification
C Journal article; C1.1 Refereed article in a scholarly journalCopyright notice
2008, Springer Science+Business Media, LLCUsage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC