Effect of Sn Addition Amount on Microstructure and Mechanical Properties of As-cast Mg-3Al-0.5SiO<sub>2 </sub>Alloy

LI Caixia; XING Shiwen; LI Chao; ZHAO Xitong

doi:DOI: 10.11973/jxgccl202303013

Materials and Mechanical Engineering > 2023 > 47(3): 72-77,84. > DOI: DOI: 10.11973/jxgccl202303013

LI Caixia, XING Shiwen, LI Chao, ZHAO Xitong. Effect of Sn Addition Amount on Microstructure and Mechanical Properties of As-cast Mg-3Al-0.5SiO₂Alloy[J]. Materials and Mechanical Engineering, 2023, 47(3): 72-77,84. DOI: DOI: 10.11973/jxgccl202303013

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Effect of Sn Addition Amount on Microstructure and Mechanical Properties of As-cast Mg-3Al-0.5SiO₂Alloy

School of Materials Science and Chemical Engineering, Harbin University of Technology, Harbin 150040, China

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Received Date: November 16, 2021
Revised Date: November 03, 2022

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Abstract

Abstract

Mg-3Al-0.5SiO₂-xSn (x=0,1,3,5,7,10, mass fraction/%) alloys were melted and casted by taking pure magnesium ingot, pure aluminum ingot, pure tin ingot and nano-SiO₂ powder as raw materials. The effects of Sn addition amount on the microstructure and mechanical properties of the alloys were studied. The results show that with increasing Sn addition amount, the coarse primary Mg₂Si phase gradually transformed into granular or acicular phase, and the Mg₂Sn phase content increased. When the mass fraction of Sn was 5%, Mg₂Sn phase had the most uniform distribution and the smallest size. The strength and precentage elongation after fracture of the alloy increased and then decreased with the increase of Sn addition amount, and the fracture mode changed from brittle fracture to ductile fracture and then to brittle fracture. When the Sn mass fraction was 5%, the alloy had the best tensile properties at room temperature with the tensile strength, yield strength and precentage elongation after fracture of 145.6 MPa, 98.7 MPa and 7.12%, respectively, and the fracture mode was brittle fracture.
- Mg-3Al-0.5SiO₂alloy,
- Sn addition,
- microstructure,
- tensile property

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Effect of Sn Addition Amount on Microstructure and Mechanical Properties of As-cast Mg-3Al-0.5SiO2 Alloy

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Effect of Sn Addition Amount on Microstructure and Mechanical Properties of As-cast Mg-3Al-0.5SiO₂Alloy