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

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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.

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Notes

  1. JEOL is a trademark of Japan Electron Optics Ltd., Tokyo.

  2. PHILIPS is a trademark of Philips Electronic Instruments Corp., Mahwah, NJ.

  3. Instron is the trademark of Instron Ltd., Buckinghamshire, UK.

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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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Authors and Affiliations

  1. Institute of Materials Science and Engineering, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan, Republic of China

    S.X. Ding (Research Student), C.P. Chang (Professor) & P.W. Kao (Professor)

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  1. S.X. Ding
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  2. C.P. Chang
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  3. P.W. Kao
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Correspondence to C.P. Chang.

Additional information

Manuscript submitted May 8, 2008.

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Ding, S., Chang, C. & Kao, P. Effects of Processing Parameters on the Grain Refinement of Magnesium Alloy by Equal-Channel Angular Extrusion. Metall Mater Trans A 40, 415–425 (2009). https://doi.org/10.1007/s11661-008-9747-3

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