Research microstructure and mechanical properties of AZ31 magnesium alloy by semisolid extruding with electromagnetic stirring process

Volume 7, Issue 3, June 2022     |     PP. 46-57      |     PDF (851 K)    |     Pub. Date: September 2, 2022
DOI: 10.54647/materials43193    89 Downloads     93662 Views  

Author(s)

Qiang Li, Weifang Key Lab of Light Weight Material Manufacturing and Processing, Shandong, China; Weifang University of Science and Technology, Jinguang St., Shouguang, Shandong, China
Dongbai Xie, Weifang Key Lab of Light Weight Material Manufacturing and Processing, Shandong, China; Weifang University of Science and Technology, Jinguang St., Shouguang, Shandong, China
Hui Guo, Weifang Key Lab of Light Weight Material Manufacturing and Processing, Shandong, China; Weifang University of Science and Technology, Jinguang St., Shouguang, Shandong, China

Abstract
To improve AZ31 magnesium (Mg) alloy plasticity, semisolid extruding with electromagnetic stirring process was adopted, and then the mechanical properties and microstructure were studied. The melting temperature was 730℃, and the preheat temperature of the die was set as 300℃, and electromagnetic stirring parameters were 6Hz and 150A with the stirring time 45s, while the rheological extrusion force was 3000KN, the extruding speed was 2mm/s, extruding time was 35s and the extrusion ratio is 10:1. The results show that tensile strength and grain size of AZ31 Mg alloy without rheological extrusion were 174MPa and 124µm, and there were some twins appeared in grains due to the electro-magnetic stirring treatment. With extrusion process, the grain size was refined to 4.91µm, and recrystallization was happened. In addition the tensile strength and the elongation rose up to 206 MPa and 18.35%, respectively, which indicated that the semi-solid processing combined electro-magnetic stirring with extruding technology could improve the tensile and elongation of AZ31 Mg alloy greatly.

Keywords
Magnesium AZ31 alloy; Semisolid extruding; Electromagnetic stirring, mechanical properties

Cite this paper
Qiang Li, Dongbai Xie, Hui Guo, Research microstructure and mechanical properties of AZ31 magnesium alloy by semisolid extruding with electromagnetic stirring process , SCIREA Journal of Materials. Volume 7, Issue 3, June 2022 | PP. 46-57. 10.54647/materials43193

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