Microstructure and microhardness evolution of a Mg83Ni6Zn5Y6 alloy upon annealing

doi:10.1016/j.jallcom.2011.04.067

IMR OpenIR

	Microstructure and microhardness evolution of a Mg83Ni6Zn5Y6 alloy upon annealing
	Shao, X. H.1; Yang, Z. Q.1; You, J. H.2; Qiu, K. Q.2; Ma, X. L.1
通讯作者	Ma, X. L.(xlma@imr.ac.cn)
	2011-06-30
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	509 期号:26 页码:7221-7228
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.
关键词	Mg alloy Microstructure Microhardness Long period stacking ordered phase Intermetallic phase
资助者	National Natural Science Foundation of China ; National Basic Research Program of China
DOI	10.1016/j.jallcom.2011.04.067
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000291005700007
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/104667
专题	中国科学院金属研究所
通讯作者	Ma, X. L.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110178, 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.