Paper Title:
Grain Refinement of Magnesium Alloy AZ31 under Torsion Extrusion with a Square-Hole Die
  Abstract

Grain refinement and crystal orientation of magnesium alloy AZ31 under torsion extrusion with a square-hole die are investigated. The optimum temperature and ratio of the die rotation speed to the extrusion speed were clarified, resulting in uniformly distributed fine grains with sizes in the range 1- m over the entire cross section of the worked specimen. The crystal orientation of the specimen was determined by electron backscatter diffraction and compared with that of a conventionally extruded specimen. In the case of torsion extrusion, a very strong <0001> texture was observed along the extrusion axis, especially in the center region of the cross section. In contrast, the <0001> direction of many grains in the conventionally extruded specimen tended to be perpendicular to the extrusion axis.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
711-714
DOI
10.4028/www.scientific.net/MSF.654-656.711
Citation
S. Mizunuma, T. Iizuka, K. Mitsui, H. Okumura, M. Kohzu, "Grain Refinement of Magnesium Alloy AZ31 under Torsion Extrusion with a Square-Hole Die", Materials Science Forum, Vols. 654-656, pp. 711-714, 2010
Online since
June 2010
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