Microstructure and Mechanical Properties of Mg-6Zn-2Si Alloy Processed by Equal Channel Angular Pressing

Abstract:

The Mg-6Zn-2Si alloy was processed by equal channel angular pressing (ECAP) for 4 passes and 8 passes at 573K, and the microstructure and mechanical properties of the alloy before and after ECAP were studied. The results show that Chinese script type interphase of Mg₂Si was crushed into dispersed particles, and significant grain refinement was also introduced to the matrix phase (α-Mg) and Mg₅₁Zn₂₀ phase after 4 passes of ECAP. The yield strength was increased by 180%, elongation by 140% and tensile strength by 75%. The microstructure and mechanical properties remained reasonably constant between 4 and 8 passes of ECAP. The mechanism of improvement on microstructure and mechanical properties of the experimental alloy by subjecting ECAP was also investigated.

• Periodical: Materials Science Forum (Volumes 747-748)
• Pages: 289-294
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.747-748.289
• Online since: February 2013
• Authors: Yi Zhang, Fu Yin Han, Yong Sheng Wang, Wei Liang, Ping Wang, Jia Xue You, Xi Ting Zhong
• Keywords: Magnesium Alloy, Mechanical Property, Mg₂Si Phase, Microstructure

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