Effect of Mg content on microstructure and properties of Zn-Al-Cu Alloy

Abstract Zn-Cu-Al-xMg (x=0,0.25,0.5) zinc alloy was prepared by metal mould casting. The effects of Mg addition on the structure, electrical conductivity and mechanical properties of Zn-Al-Cu alloy were studied. The results show that without Mg addition, the alloy consists of Zn solid solution(ƞ pha...

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Bibliographic Details
Published in:	IOP conference series. Earth and environmental science 2021-02, Vol.675 (1), p.12059
Main Authors:	Wang, Hongxing, Wu, Canhui, Zhang, Yan, Zhan, Henghui, Li, Yu, Lu, Qianyi, Xu, Yajun
Format:	Article
Language:	eng
Subjects:	Abrasive wear Adhesive wear Adhesives Aluminum base alloys Copper Electrical conductivity Electrical resistivity Hardness Intermetallic compounds Magnesium Mechanical properties Solid solutions Tensile strength Wear Wear mechanisms Zinc Zinc base alloys
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Summary:	Abstract Zn-Cu-Al-xMg (x=0,0.25,0.5) zinc alloy was prepared by metal mould casting. The effects of Mg addition on the structure, electrical conductivity and mechanical properties of Zn-Al-Cu alloy were studied. The results show that without Mg addition, the alloy consists of Zn solid solution(ƞ phase) containing of Cu and Al and layered α+η eutectic structure. With the addition of Mg, the η phase grains were refined, the layered eutectic structure disappeared, and the intermetallic compound Mg 2 Zn 11 appeared, and its content increased with the increase of Mg content. The hardness of the alloy increases with the increase of Mg content. When the content of Mg is 0.5wt.%, the hardness reaches the maximum value of 151HV. Tensile strength and electrical conductivity first increase and then decrease. When the addition of Mg is 0.25wt.%, the maximum tensile strength and electrical conductivity are 270 MPa and 26.4% IACS, respectively. The wear mechanism of zinc alloy is a mixture of adhesive wear and abrasive wear, and the adhesive wear is dominant.
ISSN:	1755-1307 1755-1315