Influence of alloying elements Nb, Zr, Sn, and oxygen on structural stability and elastic properties of the Ti2448 alloy

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	Influence of alloying elements Nb, Zr, Sn, and oxygen on structural stability and elastic properties of the Ti2448 alloy
	J. H. Dai; Y. Song; W. Li; R. Yang; L. Vitos
	2014
发表期刊	Physical Review B
ISSN	1098-0121
卷号	89 期号:1
摘要	The mechanisms of how alloying elements and oxygen influence the stability and elastic properties of binary Ti-X(X=Nb, Zr, or Sn) and Ti2448 (Ti-24Nb-4Zr-8Sn in wt.%) alloys are studied via first principles calculations. In addition to the fully disordered solid solution phase, we consider 44 quasirandom configurations to search for the possible distributions of the alloying elements in Ti2448. Our results show that all alloying elements considered here are good beta-stabilizers for Ti, and the formation energies are greatly affected by their distributions. The site preference of oxygen and its concentration dependence in binary Ti alloys and in Ti2448 are also investigated. Oxygen prefers to occupy the octahedral site regardless of the concentrations of the alloys and strongly interacts with Ti and Nb in Ti-Nb. The elastic properties of Ti2448 alloy and the influence of oxygen on the elastic parameters are evaluated. The calculated polycrystalline Young's modulus of the Ti2448 alloy is very close to that of the human bone (10-40 GPa). We find that oxygen has a weak effect on the elastic moduli of Ti2448. The electronic structures are analyzed to reveal how the alloying elements and oxygen influence the stability of binary Ti-X and Ti2448 alloys.
部门归属	[dai, j. h. ; song, y.] harbin inst technol, sch mat sci & engn, weihai 264209, peoples r china. [yang, r.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [li, w. ; vitos, l.] royal inst technol, dept mat sci & engn, se-10044 stockholm, sweden. [vitos, l.] uppsala univ, dept phys & astron, div mat theory, se-751210 uppsala, sweden. [vitos, l.] wigner res ctr phys, res inst solid state phys & opt, h-1525 budapest, hungary. ; song, y (reprint author), harbin inst technol, sch mat sci & engn, 2 west wenhua rd, weihai 264209, peoples r china. ; sy@hitwh.edu.cn
关键词	Plastic-deformation Mechanism Titanium-alloys Martensitic-transformation Biomedical Applications Multifunctional Alloys Youngs Modulus Gum Metal Superelasticity Strength 1st-principles
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/321006/72540
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. H. Dai,Y. Song,W. Li,et al. Influence of alloying elements Nb, Zr, Sn, and oxygen on structural stability and elastic properties of the Ti2448 alloy[J]. Physical Review B,2014,89(1).
APA	J. H. Dai,Y. Song,W. Li,R. Yang,&L. Vitos.(2014).Influence of alloying elements Nb, Zr, Sn, and oxygen on structural stability and elastic properties of the Ti2448 alloy.Physical Review B,89(1).
MLA	J. H. Dai,et al."Influence of alloying elements Nb, Zr, Sn, and oxygen on structural stability and elastic properties of the Ti2448 alloy".Physical Review B 89.1(2014).