Hot Deformation Mechanisms in AZ31 Magnesium Alloy Extruded at Different Temperatures : Impact of Texture

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)292-312
Journal / PublicationMetals
Volume2
Issue number3
Online published23 Aug 2012
Publication statusPublished - Sep 2012

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Abstract

The hot deformation characteristics of AZ31 magnesium alloy rod extruded at temperatures of 300 °C, 350 °C and 450 °C have been studied in compression. The extruded material had a fiber texture with < 1010 > parallel to the extrusion axis. When extruded at 450 °C, the texture was less intense and the < 1010 > direction moved away from the extrusion axis. The processing maps for the material extruded at 300 °C and 350 °C are qualitatively similar to the material with near-random texture (cast-homogenized) and exhibited three dynamic recrystallization (DRX) domains. In domains #1 and #2, prismatic slip is the dominant process and DRX is controlled by lattice self-diffusion and grain boundary self-diffusion, respectively. In domain #3, pyramidal slip occurs extensively and DRX is controlled by cross-slip on pyramidal slip systems. The material extruded at 450 °C exhibited two domains similar to #1 and #2 above, which moved to higher temperatures, but domain #3 is absent. The results are interpreted in terms of the changes in < 1010 > fiber texture with extrusion temperature. Highly intense < 1010 > texture, as in the rod extruded at 350 °C, will enhance the occurrence of prismatic slip in domains #1 and #2 and promotes pyramidal slip at temperatures >450 °C (domain #3).

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Hot Deformation Mechanisms in AZ31 Magnesium Alloy Extruded at Different Temperatures : Impact of Texture. / Rao, Kamineni Pitcheswara; Prasad, Yellapregada Venkata Rama Krishna; Dzwonczyk, Joanna; Hort, Norbert; Kainer, Karl Ulrich.

In: Metals, Vol. 2, No. 3, 09.2012, p. 292-312.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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