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Effects of Processing Parameters on the Grain Refinement of Magnesium Alloy by Equal-Channel Angular Extrusion

  • S.X. Ding
  • C.P. ChangEmail author
  • P.W. Kao
Article

Abstract

The Mg-3 pct Al-1 pct Zn (AZ31) alloy has been used as a model material for understanding the grain-refinement process of a Mg alloy fabricated by equal-channel angular extrusion (ECAE). The effects of ECAE processing parameters on grain refinement have also been studied; it was found that these effects are quite different from those for fcc metals. A multitemperature extrusion procedure has been developed, which can produce an ultrafine-grained AZ31 alloy having a grain size 0.37 μm. For the AZ31 alloy, this ultrafine-grained alloy has a record high strength accompanied by reasonably good tensile ductility. The success of the development of this ECAE procedure proves that ECAE can offer a good opportunity for the development of high-strength Mg alloys.

Keywords

Dynamic Recrystallization AZ31 Alloy Extrusion Temperature Extrusion Speed Equivalent Circle Diameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgment

The authors thank the National Science Council of Taiwan for the support of their research through Contract Nos. NSC 93-2216-E110-007 and NSC 94-2216-E110-003.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2009

Authors and Affiliations

  1. 1.Institute of Materials Science and EngineeringNational Sun Yat-sen UniversityKaohsiungTaiwan, Republic of China

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