Effects of Zn content on microstructures and mechanical properties of Mg-Zn-RE-Sn-Zr-Ca alloys

doi:10.1016/j.msea.2014.03.111

	Effects of Zn content on microstructures and mechanical properties of Mg-Zn-RE-Sn-Zr-Ca alloys
	Chen, T.J.; Zhang, D.H.; Wang, W.; Ma, Y.; Hao, Y.
刊名	Materials Science and Engineering A
	2014-06-23
卷号	607 页码:17-27
关键词	Binary alloys Calcium alloys Magnesium alloys Mechanical properties Microstructure Neodymium alloys Textures Tin alloys Zircaloy Growth restriction Intergranular modes Mg-Zn-RE alloy Microstructures and mechanical properties Shrinkage porosity Strengthening phase Ternary phase Transgranular modes
ISSN号	09215093
DOI	10.1016/j.msea.2014.03.111
英文摘要	The effects of Zn content on microstructures and mechanical properties of Mg-Zn-RE alloys have been investigated. The results indicate that RE-rich phases will change from the MgY and Mg12Nd binary phases in turn to Z (Mg12ZnRE), Z+W (Mg3Zn3RE2), W and W+I (Mg3Zn6RE) ternary phases as the Zn content increases from 0% to 4%. The grain size decreases when the Zn content increases from 0% to 2% and then increases, which is attributed to the variation of growth restriction factor resulted from the phase changes. The hardness continuously increases due to the formation of the ternary phases and their amount increase. The UTS and elongation first increase as the Zn content increases within the range of 0-2% and then decrease. The W phase is an ideal strengthening phase because the grain bonding strength of the unique W phase-containing alloy is higher than that of the Z or Z+W phase-containing alloy. Shrinkage porosities are easy to generate and the ternary phases distribute more and more continuously due to their amount increase when the Zn content exceeds 2%. The fracture regime changes from intergranular mode to transgranular mode as the Zn content increases from 0% to 2%, and then turns into transgranular mode again. © 2014 Elsevier B.V.
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000337644000004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150370]
专题	材料科学与工程学院
作者单位	Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Chen, T.J.,Zhang, D.H.,Wang, W.,et al. Effects of Zn content on microstructures and mechanical properties of Mg-Zn-RE-Sn-Zr-Ca alloys[J]. Materials Science and Engineering A,2014,607:17-27.
APA	Chen, T.J.,Zhang, D.H.,Wang, W.,Ma, Y.,&Hao, Y..(2014).Effects of Zn content on microstructures and mechanical properties of Mg-Zn-RE-Sn-Zr-Ca alloys.Materials Science and Engineering A,607,17-27.
MLA	Chen, T.J.,et al."Effects of Zn content on microstructures and mechanical properties of Mg-Zn-RE-Sn-Zr-Ca alloys".Materials Science and Engineering A 607(2014):17-27.