Effects of heat treatment on microstructure and mechanical properties of ZW21 magnesium alloy

doi:10.1016/j.jallcom.2012.08.058

	Effects of heat treatment on microstructure and mechanical properties of ZW21 magnesium alloy
	Chen, T. J.; Wang, W.; Zhang, D. H.; Ma, Y.; Hao, Y.
	2013-01-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	546 页码:28-40
摘要	The effects of heat treatment on the microstructure and mechanical properties of a ZW21 magnesium alloy are investigated. The results indicate that the interdendritic eutectic W phase with discontinuous laths and large-sized pools in the as-cast ZW21 alloy is harmful to its mechanical properties. But heat treatment including solution and subsequent aging can change the amount, size, morphology and distribution of the W phase, and thus can improve the mechanical properties. The treatment technique of solution at 525 degrees C for 4 h and subsequent aging at 250 degrees C for 24 h is appropriate for this alloy and can increase the ultimate tensile strength, elongation and hardness from 205 MPa, 18.25% and 50 HV of the as-cast alloy to 243 MPa, 23.75% and 68.7 HV, respectively. The fracture regimes such as quasi-cleavage or cleavage and the proportion of grain debonding in crack propagation also change with the treatment parameters. All of these changes are attributed to the variation of deformation harmony resulted from composition homogenization, grain growth and MgSnCa particle coarsening, or/and grain bonding strength determined by the distribution of W phase. (C) 2012 Elsevier B.V. All rights reserved.
关键词	ZW21 magnesium alloy Heat treatment Microstructure Mechanical properties Fracture regime
DOI	10.1016/j.jallcom.2012.08.058
收录类别	SCI ; SCIE
语种	英语
资助项目	National Basic Research Program of China[G2010CB635106] ; Program for New Century Excellent Talents in University of China[NCET-10-0023]
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:000311503000005
出版者	ELSEVIER SCIENCE SA
EI入藏号	20124915744897
EI主题词	Heat treatment
EI分类号	537.1 Heat Treatment Processes - 546.2 Tin and Alloys - 549.2 Alkaline Earth Metals - 933.1.2 Crystal Growth - 951 Materials Science
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/34765
专题	材料科学与工程学院
通讯作者	Chen, T. J.
作者单位	Lanzhou Univ Technol, Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China
第一作者单位	材料科学与工程学院
通讯作者单位	材料科学与工程学院
第一作者的第一单位	材料科学与工程学院
推荐引用方式 GB/T 7714	Chen, T. J.,Wang, W.,Zhang, D. H.,et al. Effects of heat treatment on microstructure and mechanical properties of ZW21 magnesium alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2013,546:28-40.
APA	Chen, T. J.,Wang, W.,Zhang, D. H.,Ma, Y.,&Hao, Y..(2013).Effects of heat treatment on microstructure and mechanical properties of ZW21 magnesium alloy.JOURNAL OF ALLOYS AND COMPOUNDS,546,28-40.
MLA	Chen, T. J.,et al."Effects of heat treatment on microstructure and mechanical properties of ZW21 magnesium alloy".JOURNAL OF ALLOYS AND COMPOUNDS 546(2013):28-40.

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