期刊
JOURNAL OF APPLIED PHYSICS
卷 110, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3644907
关键词
-
资金
- The Swedish Research Council
- Swedish Foundation for Strategic Research
- Swedish Energy Agency
- Swedish Steel Producers' Association (Jernkontoret)
- China Scholarship Council
- Hungarian Scientific Research Fund [OTKA 84078]
- Erasmus Mundus External Cooperation Lot3
The elastic properties of paramagnetic face-centered-cubic (fcc) Fe1-xMx (M = Al, Si, V, Cr, Mn, Co, Ni, and Rh; 0 <= x <= 0.1) random alloys are investigated using the exact muffin-tin orbitals density functional method in combination with the coherent-potential approximation. We find that the theoretical lattice parameter of fcc Fe is strongly enlarged by Al, V, and Rh and slightly reduced by Si, Cr, and Co, while it remains nearly constant with Mn and Ni. Both positive and negative alloying effects appear for the elastic constants C-ij(x) of fcc Fe. These findings are in contrast to those obtained for ferromagnetic body-centered-cubic (bcc) Fe alloys, where all alloying elements considered here are predicted to enlarge the lattice parameter and decrease the C-11(x) and C-12(x) elastic constants of bcc Fe. With some exceptions, alloying has much larger effects on ferromagnetic bcc alloys than on paramagnetic fcc ones. Based on the theoretical elastic parameters of the paramagnetic fcc and ferromagnetic bcc phases, simple parameterizations in terms of chemical composition of the equilibrium lattice constants, single-crystal elastic constants, and polycrystalline elastic moduli of Fe-based alloys are presented. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3644907]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据