Microstructures and Mechanical Properties of Extruded High-Purity Magnesium

Abstract:

The microstructure and mechanical properties of the high-purity magnesium (99.99wt.% Mg) extruded by single direct extrusion experiment were investigated. For the extrusion speed of 0.2mm/s, the microstructure of extruded Mg rods was composed of equiaxed fine dynamical recrystallized (DRXed) grains and some elongated coarse un-DRXed grains. The yield strength (YS) and the elongation of the extruded bars were 105.3MPa and 46.7% respectively. In the case of extrusion speed of 4.0mm/s, the DRXed grains were remarkably coarsened and the elongated coarse un-DRXed grains vanished, meanwhile lots of twins occurred and the intensity of basal-plane texture increased a little. With the extrusion speed being raised from 0.2mm/s to 4.0mm/s, the YS and the elongation decreased to 60.5MPa and 22.1% respectively, but the ultimate tensile strength (UTS) was improved from 154.7MPa to 178.8MPa.

• Periodical: Materials Science Forum (Volume 816)
• Pages: 439-445
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.816.439
• Online since: April 2015
• Authors: Xiaohui Feng, Hong Min Jia, Tian Jiao Luo, Yun Teng Liu, Ji Xue Zhou, Yang De Li, Wei Rong Li, Yuan Sheng Yang*
• Keywords: Extrusion, High-Purity Magnesium, Mechanical Properties, Microstructure

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