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Extrusion limits of magnesium alloys

journal contribution
posted on 2007-12-12, 00:00 authored by Dale Atwell, Matthew BarnettMatthew Barnett
Magnesium alloys are generally found to be slower to extrude than aluminum alloys; however, limited quantitative comparisons of the actual operating windows have been published. In this work, the extrusion limits are determined for a series of commercial magnesium alloys (M1, ZM21, AZ31, AZ61, and ZK60). These are compared with the limits established for aluminum alloy AA6063. The maximum extrusion speed of alloy M1 is shown to be similar to AA6063. Alloys ZM21, AZ31, ZK60, and AZ61 exhibit maximum extrusion speeds 44, 18, 4, and 3 pct, respectively, of the maximum measured for AA6063. For AZ31, the maximum extrusion speed is increased by 22 pct after homogenization and by 64 pct for repeat extrusions. The variation in the extrusion limits with changing alloy content is rationalized in terms of differences in the hot working flow stress and solidus temperature.

History

Journal

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Volume

38

Issue

12

Pagination

3032 - 3041

Publisher

ASM International

Location

Materials Park, Oh.

ISSN

1073-5623

eISSN

1543-1940

Language

eng

Notes

Copyright 2007, ASM International. This paper was published in Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, Vol. 38, Issue 12, pp. 3032-3041 and is made available as an electronic reprint with the permission of ASM International. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplications of any material in this paper for a fee or for commercial purposes, or modification of the content of this paper are prohibited.

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2007, ASM International