Grain Refinement in Magnesium Alloy AZ31 during Multidirectional Forging under Decreasing Temperature Conditions

Abstract:

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Grain refinement in a magnesium alloy AZ31 was studied in multi-directional forging (MDF) at a strain rate of 3×10-3s-1 with decreasing temperature from 623K to 423K. The MDF was carried out up to large cumulative strains with changing the loading direction during decreasing temperature from pass to pass. The structural changes were characterized by generation of many mutually crossing kink bands at low strains, followed by development of very fine grains at large strains. The results showed that MDF with decreasing temperature can accelerate uniform generation of much finer grains, resulting in the minimal grain size of 0.36µm in a cumulative strain of 4.8 at 423K. The mechanism of grain refinement was discussed.

Info:

Periodical:

Materials Science Forum (Volumes 488-489)

Edited by:

W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo

Pages:

597-600

DOI:

10.4028/www.scientific.net/MSF.488-489.597

Citation:

J. Xing et al., "Grain Refinement in Magnesium Alloy AZ31 during Multidirectional Forging under Decreasing Temperature Conditions", Materials Science Forum, Vols. 488-489, pp. 597-600, 2005

Online since:

July 2005

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Price:

$35.00

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