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 journal › peer-review
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Original language | English |
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Pages (from-to) | 292-312 |
Journal / Publication | Metals |
Volume | 2 |
Issue number | 3 |
Online published | 23 Aug 2012 |
Publication status | Published - Sep 2012 |
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-84969388177&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(30cf7a03-72b4-4100-a82e-6e2144de6668).html |
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 journal › peer-review
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