铸态与挤压态AM50-4%(Zn,Y)合金组织及力学性能

doi:10.11896/cldb.19080123

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Abstract The microstructures and mechanical properties of as-cast AM50, as-cast and extruded AM50-4%(Zn,Y) alloys (the atomic ratio of Zn and Y is 6) were studied by OM, XRD, SEM/EDS, EBSD and tensile tests. The results show that the microstructure of alloy is mainly composed of α-Mg, β-Mg₁₇(Al, Zn)₁₂ and Φ-Mg₂₁(Zn, Al)₁₇ phases and a small amount of Al₆YMn₆ and Al₂Y phases when Zn,Y elements are added to AM50 alloy.The addition of Zn,Y element refined the microstructure of AM50 alloy, improved the morphology of β phase, and improved the comprehensive mechanical properties of the alloy. After hot extrusion deformation of AM50-4%(Zn,Y) alloy at 370 ℃, the β-Mg₁₇(Al, Zn)₁₂ phase dissolved in the matrix precipitates again along the grain boundary, but the Φ phase did not precipitate. At the same time, a small amount of Al₆YMn₆ and Al₂Y phases were still dispersed in the alloy matrix. In addition, EBSD analysis shows that the grain size is refined to 7.32 μm after hot extrusion, and show a typical extrusion texture. Due to grain refinement, precipitation strengthening and typical texture of extruded alloy, the mechanical properties of extruded AM50-4%(Zn, Y) alloy were further improved, and its tensile strength, yield strength and elongation can reach to 303 MPa, 193 MPa and 13%, respectively.

Key words： magnesium alloy AM50 extrusion deformation microstructure mechanical property

Published: 06 November 2020

CLC number:

TG146.2

Fund:Liaoning Revitalization Talents Program (XLYC1807021),Youth Project of Liaoning Education Department (LQGD2017032) and Innovation Talent Program in Sciences and Technologies for Young and Middleaged Scientists of Shenyang (RC180111).

About author:: Boning Wangreceived his bachelor’s degree in July 2018 from Shenyang University of Technology.In August of the same year, he has studied for a master’s degree at Shenyang University of Technology, mainly engaged in the research of high performance magnesium alloy and its application.
Feng Wangcurrently is a Professor and Ph.D. adviser in School of Materials Science and Engineering, Shen-yang University of Technology. Lectures on Material Forming Technology, Material Forming Equipment and Plastic Processing Mechanics, etc.In the teaching work, he presided over and participated in 4 teaching reform projects, and won 1 provincial teaching reform achievement, 1 first prize and 2 second prizes for school education and teaching achievement.At present, he is mainly engaged in the research of nonferrous alloy and its forming technology,in 2011, he was appraised as the academic backbone of the school youth, and presided over the completion of the provincial innovation team project, the provincial doctoral project and the general project of the provincial education department, as well as 4 enterprise projects.Participate in the completion of the national “15” science and technology support plan 2, “11th five-year plan” science and technology support plan 1 and “12th five-year plan” science and technology support plan 3, international science and technology cooperation project 1, Liaoning Province Science and Technology Research Project 1 and Shenyang Science and Technology Innovation Fund Project 1.At present, presided over 1 provincial natural fund project, participated in the National Natural Fund Project, Liaoning Provincial Education Department Innovation Team Project and general project.45 academic papers have been published in Journal of Materials Research,Materials Science and Engineering A, Acta Metallurgica Sinica and Metal Journals, and 25 have been collected by SCI/EI. 32 applications for invention patents, 18 authorizations and 6 patent transfers.He has won 2 second prize of science and technology award of China machinery industry association, 2 third prize of science and technology progress award of Liaoning province and 1 second prize of invention patent of Shenyang city. As a deputy editor-in-chief, he edited Thermodynamics and Phase Diagram of Magnesium Alloy, Practical Die Casting Technology and Casting Alloy Melting.

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Cite this article:

WANG Boning,WANG Feng,WANG Zhi, et al. Microstructure and Mechanical Properties of As-cast and Extruded AM50-4%(Zn,Y) Alloys[J]. Materials Reports, 2020, 34(20): 20076-20080.

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http://www.mater-rep.com/EN/10.11896/cldb.19080123 OR http://www.mater-rep.com/EN/Y2020/V34/I20/20076

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