Microstructure and microhardness evolution of a Mg83Ni6Zn5Y6 alloy upon annealing

doi:10.1016/j.jallcom.2011.04.067

CORC > 金属研究所 > 中国科学院金属研究所

	Microstructure and microhardness evolution of a Mg83Ni6Zn5Y6 alloy upon annealing
	Shao, X. H.2; Yang, Z. Q.2; You, J. H.1; Qiu, K. Q.1; Ma, X. L.2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2011-06-30
卷号	509 期号:26 页码:7221-7228
关键词	Mg alloy Microstructure Microhardness Long period stacking ordered phase Intermetallic phase
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2011.04.067
通讯作者	Ma, X. L.(xlma@imr.ac.cn)
英文摘要	The microstructures and the corresponding microhardness evolution of a Mg83Ni6Zn5Y6 (at.%) alloy subjected to a series of heat treatments were investigated. In addition to the 14H long period stacking ordered (LPSO) phase, a diamond-cubic phase with the possible space group of Fd (3) over barm and lattice parameter of a = 0.73nm were identified in the as-cast alloy. The combination of LPSO thin lamellae and the nanometer-sized cubic phase leads to a relatively high Vickers microhardness of about 116.2 +/- 13.7. When annealed at 473K and 573 K, the above diamond-cubic phase partially transforms to its structural variant, Fm (3) over barm, together with a slight change of lattice parameter (a = 0.72 nm). Precipitation of hexagonal Mg2Ni lath also happens at these moderate annealing temperatures. The remarkable increase of microhardness at this stage is believed to result from the strengthening of precipitates and the resultant coherent interface between the precipitates and their surrounding medium. When annealed at temperatures ranging from 673K to 773 K, the Mg2Ni precipitates were dissolved, grain coarsening in the alloy occurred, Fd (3) over barm phase completely transformed to its Fm (3) over barm counterpart, and consequently microhardness of the alloy was decreased significantly. (C) 2011 Elsevier B. V. All rights reserved.
资助项目	National Natural Science Foundation of China ; National Basic Research Program of China[2009CB623705]
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:000291005700007
资助机构	National Natural Science Foundation of China ; National Basic Research Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/104666]
专题	金属研究所_中国科学院金属研究所
通讯作者	Ma, X. L.
作者单位	1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110178, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Shao, X. H.,Yang, Z. Q.,You, J. H.,et al. Microstructure and microhardness evolution of a Mg83Ni6Zn5Y6 alloy upon annealing[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2011,509(26):7221-7228.
APA	Shao, X. H.,Yang, Z. Q.,You, J. H.,Qiu, K. Q.,&Ma, X. L..(2011).Microstructure and microhardness evolution of a Mg83Ni6Zn5Y6 alloy upon annealing.JOURNAL OF ALLOYS AND COMPOUNDS,509(26),7221-7228.
MLA	Shao, X. H.,et al."Microstructure and microhardness evolution of a Mg83Ni6Zn5Y6 alloy upon annealing".JOURNAL OF ALLOYS AND COMPOUNDS 509.26(2011):7221-7228.