Effect of rare earth elements on the structures and mechanical properties of magnesium alloys

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	Effect of rare earth elements on the structures and mechanical properties of magnesium alloys
	Z. Lu; J. Zhou; Z. M. Sun; R. S. Chen
	2013
发表期刊	Chinese Science Bulletin
ISSN	1001-6538
卷号	58 期号:7 页码:816-820
摘要	By means of first-principles calculations, we have investigated the effects of rare earth elements (REEs) on the structures and mechanical properties of magnesium. The lattice parameters, elastic constants, bulk moduli, shear moduli, Young's moduli and anisotropic parameter of these solid solutions have been calculated and analyzed. The nearest-neighbor distance between Mg and the REEs is also analyzed to explore the correlation with the bulk moduli. The results show that the 4f-electrons and atomic radii play an important role in the strengthening process. The anomalies of the lattice parameters and mechanical properties at Eu and Yb are due to the half-filled and full-filled 4f-electron orbital states. Finally, the increase of directional bonding character near the alloying elements may account for the anisotropy and brittleness of these magnesium alloys.
部门归属	[lu zhong ; zhou jian ; sun zhimei] xiamen univ, coll mat, dept mat sci & engn, xiamen 361005, peoples r china. [chen rongshi] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; zhou, j (reprint author), xiamen univ, coll mat, dept mat sci & engn, xiamen 361005, peoples r china. ; jzhou@xmu.edu.cn
关键词	Magnesium Alloys Solid Solution Hardening First-principles Chemical Bonding Initio Molecular-dynamics Single-crystals Elastic-constants Transition-metals Creep Strength Germanium Modulus
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71393
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Lu,J. Zhou,Z. M. Sun,et al. Effect of rare earth elements on the structures and mechanical properties of magnesium alloys[J]. Chinese Science Bulletin,2013,58(7):816-820.
APA	Z. Lu,J. Zhou,Z. M. Sun,&R. S. Chen.(2013).Effect of rare earth elements on the structures and mechanical properties of magnesium alloys.Chinese Science Bulletin,58(7),816-820.
MLA	Z. Lu,et al."Effect of rare earth elements on the structures and mechanical properties of magnesium alloys".Chinese Science Bulletin 58.7(2013):816-820.