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MICROSTRUCTURE, MECHANICAL PROPERTIES AND SOLIDIFICATION BEHAVIOR OF AM50-x(Zn, Y) MAGNESIUM ALLOYS
Alternative TitleMICROSTRUCTURE, MECHANICAL PROPERTIES AND SOLIDIFICATION BEHAVIOR OF AM50-x(Zn, Y) MAGNESIUM ALLOYS
Wang Feng; Ma Dezhi; Wang Zhi; Mao Pingli; Liu Zheng
2016
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume52Issue:9Pages:1115-1122
AbstractAs the lightest metallic structural material, magnesium alloys were widely used in automotive, aerospace, electronic equipment and other fields. Among commercial magnesium alloys, AM series were commonly used due to excellent ductility and energy absorption. However, their relatively poor strength greatly restricted their extended use. In order to improve mechanical properties of AM50 alloy, the Zn and Y elements were added into the AM50 alloy in the form of atomic ratio of 6:1 by the permanent mold casting. The microstructure, solidification behavior and mechanical properties of AM50-x(Zn, Y) (x=0, 2, 3, 4, 5, mass fraction, %) alloys were investigated by OM, SEM, EDS, XRD, thermal analysis and tensile tests. The results indicated that addition of Zn and Y elements with an atomic ratio of 6:1 to AM50 alloy, the microstructures were obviously refined, and the quasicrystal I-phase (Mg3Zn6Y) cannot form. In addition, the granular Al6YMn6 phase and fine Al2Y phase were formed in the microstructure, and the size of Al6YMn6 phase increased with increasing the Zn and Y content. The Phi-Mg-21(Zn, Al)(17) phase with lamellar structure was formed around beta phase when x >= 3, and its amount increased with increasing the Zn and Y addition. Thermal analysis results show that the Phi-Mg-21(Zn, Al)(17) phase was formed at 354 degrees C by the peritectic reaction, in which the precipitation temperatures of alpha-Mg and beta phase were decreased with the increase of x content. Due to the formation of Al6YMn6, Al2Y and Phi-Mg-21(Zn, Al)(17) phases, the size and amount of the beta phase was decreased. For AM50-4(Zn, Y) alloy, the microstructure was greatly refined, and the ultimate tensile strength, yield strength and elongation of the alloy reached to the maximum, 206.63 MPa, 92.50 MPa and 10.04%, respectively.
KeywordAL-ZN ALLOYS QUASI-CRYSTAL AZ91 ALLOYS GRAIN-SIZE ADDITIONS PHASE AM50 RESISTANCE magnesium alloy AM50 microstructure thermal analysis mechanical property
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Natural Science Foundation of Liaoning Province] ; [Program for Liaoning Innovative Research Team in University]
CSCD IDCSCD:5802406
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/142651
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Wang Feng,Ma Dezhi,Wang Zhi,et al. MICROSTRUCTURE, MECHANICAL PROPERTIES AND SOLIDIFICATION BEHAVIOR OF AM50-x(Zn, Y) MAGNESIUM ALLOYS[J]. ACTA METALLURGICA SINICA,2016,52(9):1115-1122.
APA Wang Feng,Ma Dezhi,Wang Zhi,Mao Pingli,&Liu Zheng.(2016).MICROSTRUCTURE, MECHANICAL PROPERTIES AND SOLIDIFICATION BEHAVIOR OF AM50-x(Zn, Y) MAGNESIUM ALLOYS.ACTA METALLURGICA SINICA,52(9),1115-1122.
MLA Wang Feng,et al."MICROSTRUCTURE, MECHANICAL PROPERTIES AND SOLIDIFICATION BEHAVIOR OF AM50-x(Zn, Y) MAGNESIUM ALLOYS".ACTA METALLURGICA SINICA 52.9(2016):1115-1122.
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