Phase Constitution and Tensile Properties of Semi-continuous Cast Mg-6Al-6Zn-3Sn-1Y-0.5Mn Alloy at Casting State and Heat Treatment State

IMR OpenIR

	Phase Constitution and Tensile Properties of Semi-continuous Cast Mg-6Al-6Zn-3Sn-1Y-0.5Mn Alloy at Casting State and Heat Treatment State
	Zhou Jixue 1; Ma Baichang 1; Wang Jinwei 1; Tang Shouqiu 1; Yang Yuansheng 2
通讯作者	Ma Baichang(mabch@sdas.org)
	2019-07-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	48 期号:7 页码:2258-2265
摘要	The phase constitution, tensile properties and failure mechanism during tensile process of as-cast, as-solutioned and as-aged samples of a Mg-6Al-6Zn-3Sn-1Y-0.5Mn (AZTYM66310) magnesium alloy were investigated. The microstructure of semi continuous cast AZTYM66310 alloy is distributed nonuniformly. The dendrite is finer and the second phase distribution is more dispersed from the edge to the centre of the ingot, when the solidification rate is increased. The alpha-Mg primaries in the microstructure of as-cast AZTYM66310 alloy exhibit typical equiaxed dendrites morphology, and a large number of interdendritic phases form during solidification, including Mg + Mg-32(Al, Zn)(49) eutectic, Mg2Sn divorced eutectic phases, Al2Y phases and Al8Mn4Y phases. After the solution treatment of 380 degrees C/6 h, the majority of Mg-32(Al, Zn)(49) phases and part of Mg2Sn phases are dissolved into the matrix, increasing the contents of Al, Zn and Sn in the matrix significantly, while Al2Y phase and Al8Mn4Y phase do not change remarkably. Solution treatment significantly improves the tensile strength and the elongation of the alloy. After aging treatment of 380 degrees C/6 h + 150 degrees C /16 h, a large number of nano-scaled particle reinforced phases precipitate in the alloy, especially near the grain boundary, increasing the yield strength to 187.4 MPa. During the tensile process of the alloy, the second phases in the structure first break or separate from the matrix, resulting in the generation of microcracks. And then these microcracks propagate along the grain boundaries, eventually causing the sample to fracture.
关键词	AZTYM66310 magnesium alloy semi-continuous casting phase constitution tensile properties heat treatment
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000480493400032
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/134880
专题	中国科学院金属研究所
通讯作者	Ma Baichang
作者单位	1.Qilu Univ Technol, Shandong Acad Sci, Adv Mat Inst, Shandong Prov Key Lab High Strength Lightweight M, Jinan 250014, Shandong, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhou Jixue,Ma Baichang,Wang Jinwei,et al. Phase Constitution and Tensile Properties of Semi-continuous Cast Mg-6Al-6Zn-3Sn-1Y-0.5Mn Alloy at Casting State and Heat Treatment State[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(7):2258-2265.
APA	Zhou Jixue,Ma Baichang,Wang Jinwei,Tang Shouqiu,&Yang Yuansheng.(2019).Phase Constitution and Tensile Properties of Semi-continuous Cast Mg-6Al-6Zn-3Sn-1Y-0.5Mn Alloy at Casting State and Heat Treatment State.RARE METAL MATERIALS AND ENGINEERING,48(7),2258-2265.
MLA	Zhou Jixue,et al."Phase Constitution and Tensile Properties of Semi-continuous Cast Mg-6Al-6Zn-3Sn-1Y-0.5Mn Alloy at Casting State and Heat Treatment State".RARE METAL MATERIALS AND ENGINEERING 48.7(2019):2258-2265.