Effect of Homogenization Annealing on Microstructure andMechanical Properties of Mg-4Zn-4Y Alloy

ZHAI Chuantian; SUN Youping; LI Wangzhen; HE Jiangmei; WAN Siyu

doi:10.11973/jxgccl202301004

Materials and Mechanical Engineering > 2023 > 47(1): 26-33. > DOI: 10.11973/jxgccl202301004

ZHAI Chuantian, SUN Youping, LI Wangzhen, HE Jiangmei, WAN Siyu. Effect of Homogenization Annealing on Microstructure andMechanical Properties of Mg-4Zn-4Y Alloy[J]. Materials and Mechanical Engineering, 2023, 47(1): 26-33. DOI: 10.11973/jxgccl202301004

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Effect of Homogenization Annealing on Microstructure andMechanical Properties of Mg-4Zn-4Y Alloy

1. School of Mechanical and Transportation Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China;
2. Guangxi Earthmoving Machinery Collaborative Innovation Center, Guangxi University of Science and Technology, Liuzhou 545006, China;
3. Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science and Technology, Liuzhou 545006, China

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Received Date: May 26, 2021
Revised Date: June 07, 2022

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Abstract

As-cast Mg-4Zn-4Y alloy was treated by homogenization annealing at different temperatures (440,460,480℃) for different holding times (4-24 h), and the effects of homogenization annealing on the microstructure and properties of the alloy were studied. The results show that there were α-Mg phase, W phase Mg₃Zn₃Y₂, LPSO phase Mg₁₂ZnY and yttrium-rich phase in the as-cast alloy. With increasing annealing temperature, most of the LPSO phase gradually dissolved into the matrix. With increasing annealing temperature and holding time, the content of yttrium-rich phase decreased, and the dendrite segregation was reduced. Compared with the as-cast alloy, the tensile strength of the alloy after homogenization annealing at 440℃ and 460℃ decreased slightly, and the percentage elongation after fracture changed slightly. The tensile strength and percentage elongation after fracture after homogenization annealing at 480℃ were relatively high, but the burning loss occurred. The best homogenization annealing of the alloy was 440℃×12 h.
- Mg-4Zn-4Y alloy,
- homogenization annealing,
- microstructure,
- tensile property

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References

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