Atomic bonding and mechanical properties of Al-Mg-Zr-Sc alloy

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	Atomic bonding and mechanical properties of Al-Mg-Zr-Sc alloy
	Y. J. Gao; D. M. Ban; Y. J. Han; X. P. Zhong; H. Liu
	2004
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	14 期号:5 页码:922-927
摘要	The valence electron structures of Al-Mg alloy with minor Sc and Zr were calculated according to the empirical electron theory(EET) in solid. The results show that because of the strong interaction of Al atom with Zr and Sc atom in melting during solidification, the Al3Sc and Al-3 (Sc1-xZrx) particles which act as heterogeneous nuclear are firstly crystallized in alloy to make grains refine. In progress of solidification, the Al-Sc, Al-Zr-Sc segregation regions are formed in solid solution matrix of Al-Mg alloy owing to the strong interaction of Al atom with Zr, Sc atoms in bulk of alloy, so in the following homogenization treatment, the finer dispersed Al, Sc and Al, (Sc1-x Zr-x) second-particles which are coherence with the matrix are precipitated in the segregation region. These finer second-particles with the strong Al-Zr, Al-Sc covalent bonds can strengthen the covalent bonds in matrix of the alloy, and also enhance the hardness and strength of Al-Mg alloy. Those finer second-particles precipitated in interface of sub-grains can also strengthen the covalence bonds there, and effectively hinder the interface of sub-grains from migrating and restrain the sub-grains from growing, and cause better thermal stability of Al-Mg alloy.
部门归属	guangxi univ, coll phys sci & engn, nanning 530004, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;gao, yj (reprint author), guangxi univ, coll phys sci & engn, nanning 530004, peoples r china;gaoyj@gxu.edu.cn
关键词	Al-mg Alloy Zr Sc Covalent Bond Grain Refinement Mechanical Properties Scandium Zirconium
URL	查看原文
WOS记录号	WOS:000225072300017
引用统计	被引频次：14[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/321006/35359
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. J. Gao,D. M. Ban,Y. J. Han,et al. Atomic bonding and mechanical properties of Al-Mg-Zr-Sc alloy[J]. Transactions of Nonferrous Metals Society of China,2004,14(5):922-927.
APA	Y. J. Gao,D. M. Ban,Y. J. Han,X. P. Zhong,&H. Liu.(2004).Atomic bonding and mechanical properties of Al-Mg-Zr-Sc alloy.Transactions of Nonferrous Metals Society of China,14(5),922-927.
MLA	Y. J. Gao,et al."Atomic bonding and mechanical properties of Al-Mg-Zr-Sc alloy".Transactions of Nonferrous Metals Society of China 14.5(2004):922-927.