%0 Journal Article
%T The DFT analyses of effect of chromium and nickel additions on the mechanical properties of Fe3Al based alloys<br>铬和镍的添加对Fe3Al合金力学性能影响的DFT研究
%A Niu Xue-Lian
%A Wang Li-Jiu
%A Sun Dan
%A <br>牛雪莲
%A 王立久
%A 孙丹
%J 物理学报
%D 2013
%I 
%X Site preference behaviors of transition metal (TM) Cr and Ni in Fe3Al alloy and alloying effect are studied by using first-principles. Computational results show that the addition of TM is beneficial to the improvement of the stability of Fe3Al alloy; Cr atoms prefer to stay at FeI sites, while Ni atoms occupy FeII sites. Our investigations reveal that Fe2NiAl has lower bulk modulus B, shear modulus G and B/G than other (Fe3-yXy)Al (X=Cr, Ni; y=0,1,2) alloys, which turns out to be a brittle alloy. The analyses of density of states and electronic charge density indicate that additional TM improves the interaction between TM and neighboring host atoms of Fe3Al but weakens the interaction between Al and Fe.
%K alloying effects
%K first-principles
%K elastic property
%K electronic structure<br>合金化效应
%K 第一原理
%K 弹性性质
%K 电子结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=96293AEB9294B34DE22FA88857D81A82&yid=FF7AA908D58E97FA&iid=38B194292C032A66&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0