|About this Abstract
||2012 TMS Annual Meeting & Exhibition
||Magnesium Technology 2012
||Effects of Direct Extrusion Process on Microstructure, Texture Evolution and Yield Strength of Magnesium Alloy AZ31
||Shiyao Huang, Mei Li, John E. Allison, Shaorui Zhang, Dayong Li, Yinghong Peng
|On-Site Speaker (Planned)
Direct extrusions of commercial as-cast AZ31 alloy were carried out at elevated temperatures with different extrusion velocities. Microstructure and texture distribution of extruded rods were investigated with optical microscopy (OM) and electron backscattered diffraction (EBSD). Tensile tests were conducted at room temperature using samples from both casting billets and extruded rods. The experimental yield strength can not be solely described by average grain size. In this paper, the grain size and orientation in the extruded samples were characterized by EBSD, and Hall-Petch equation was applied to each individual grain with the input from EBSD results (individual grain size and orientation). The yield strength of tensile sample (polycrystalline aggregate) and individual grain was related by Taylor assumption. The predicted yield strength showed the same trend as experiment results.
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