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.
作者简介: 王柏宁,2018年7月毕业于沈阳工业大学,获得工程学士学位。同年8月在沈阳工业大学攻读硕士学位,主要从事高性能镁合金及其应用的研究。 王峰,沈阳工业大学教授,博士研究生导师。主讲《材料成型工艺》《材料成型设备》及《塑性加工力学》等课程。主持及参与教改项目4项,获省教改成果1项,校教育教学成果一等奖1项,二等奖2项。目前,主要从事有色合金及其成形技术的研究,2011年被评为校青年学术骨干,先后主持完成省创新团队项目、省博士启动项目及省教育厅一般项目各1项,以及企业课题4项;参与完成国家“十五”科技支撑计划2项、“十一五”科技支撑计划1项及“十二五”科技支撑计划3项、国际科技合作项目1项、辽宁省科技攻关项目1项及沈阳市科技创新基金项目1项。目前,主持省自然基金项目1项,参与国家自然基金项目、辽宁省教育厅创新团队项目及一般项目各1项。已在Journal of Materials Research、Materials Science and Engineering A、Acta Metallurgica Sinica及金属学报等刊物上发表学术论文45篇,被SCI/EI收录25篇。申请发明专利32项,获授权18项,专利转让6项。曾获中国机械工业协会科学技术奖二等奖2项,辽宁省科技进步奖三等奖2项,沈阳市发明专利二等奖1项。作为副主编编著《镁合金热力学及相图》《压铸实用技术》及《铸造合金熔炼》。
引用本文:
王柏宁, 王峰, 王志, 周乐, 毛萍丽, 刘正. 铸态与挤压态AM50-4%(Zn,Y)合金组织及力学性能[J]. 材料导报, 2020, 34(20): 20076-20080.
WANG Boning, WANG Feng, WANG Zhi, ZHOU Le, MAO Pingli, LIU Zheng. Microstructure and Mechanical Properties of As-cast and Extruded AM50-4%(Zn,Y) Alloys. Materials Reports, 2020, 34(20): 20076-20080.
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2020, Vol. 34 
