Microstructure and mechanical properties of extruded Mg-Y-Zn (Ni) alloys

doi:10.1016/j.jallcom.2021.160577

	Microstructure and mechanical properties of extruded Mg-Y-Zn (Ni) alloys
	Bi, Guang Li 1,2; Wang, Yashuo 1,2; Jiang, Jing 1,2; Gu, Jiarui 1,2; Li, Yuandong 1,2; Chen, Tijun 1,2; Ma, Ying 1,2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2021-11-10
卷号	881
关键词	Extruded Mg-Y-Zn (Ni) alloys LPSO phase Microstructure Mechanical properties
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2021.160577
英文摘要	The microstructure and mechanical properties of extruded Mg-2Y-1Zn (MYZ), Mg-2Y-0.5Zn-0.5Ni (MYZN) and Mg-2Y-1Ni (MYN) (at%) alloys were systematically investigated. Apart from alpha-Mg, Mg2Y, Mg24Y5, along with Yriched phases, there was precipitation of 18R LPSO phase with coarse-lamellar morphology at the dendritic grain boundary of alpha-Mg within the above three as-cast alloys. Parts of 18R LPSO phases transformed into 14H LPSO phases in homogenization. After extrusion, the grain size had obviously refined and the LPSO phase with three types of morphologies existed in three extruded alloys, distribution of lamellar 18R LPSO phase might be detected down the extrusion direction (ED), the blocky 18R LPSO phase as well as the fine strip 14H LPSO phase with some stacking faults in the grain interior. The extruded MYZN alloy exhibited the higher basal texture intensity than extruded MYZ and MYN alloys. Furthermore, we discussed the strengthening mechanisms of the LPSO phase with different morphologies. Tensile test results indicated that the as-extruded MYZN alloy exhibited the highest sigma UTS of 389 MPa, sigma TYS of 336 MPa and epsilon f of 12.6% at room temperature. As for the extruded MYZN alloy, its improved comprehensive mechanical properties were mainly related to the LPSO phase strengthening, texture strengthening, stacking faults strengthening together with grain refinement. (C) 2021 Elsevier B.V. All rights reserved.
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000669434000001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148595]
专题	材料科学与工程学院
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Bi, Guang Li,Wang, Yashuo,Jiang, Jing,et al. Microstructure and mechanical properties of extruded Mg-Y-Zn (Ni) alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,881.
APA	Bi, Guang Li.,Wang, Yashuo.,Jiang, Jing.,Gu, Jiarui.,Li, Yuandong.,...&Ma, Ying.(2021).Microstructure and mechanical properties of extruded Mg-Y-Zn (Ni) alloys.JOURNAL OF ALLOYS AND COMPOUNDS,881.
MLA	Bi, Guang Li,et al."Microstructure and mechanical properties of extruded Mg-Y-Zn (Ni) alloys".JOURNAL OF ALLOYS AND COMPOUNDS 881(2021).