%0 Journal Article
%T Mechanism of Macroalloying-induced Ductility in Ni_3Al
%A Changgong MENG
%A Jianting GUO
%A Zhuangqi HU
%A <br>
%J 材料科学技术学报
%D 1994
%I 
%X The bonding characteristics of Ni3Al doped with ternary elements has been investigated by means of the discrete variational Xα (DV-Xα) cluster method. From the computations. the addition of ternary element M (M= Pd. Ag. Cu and Co) substituting for the Ni sttes leads to the increase of delocalized bonding electrons. and the mechanism of ductilization of Ni3Al bV doping with M is explained based on the analysis of bonding characteristics. The increase of delocalized bonding electrons lowers the covalent bond directionality and strengthens grain boundary. The difference of strength between M-Al bond and M-Ni bond is an important factor in the effect of alloy stoichiometry on ductility. The larger the difference. the more the sensitivity to the alloy stoichiometry
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=15FE8B2AC9C43FFE&yid=3EBE383EEA0A6494&vid=F3090AE9B60B7ED1&iid=E158A972A605785F&sid=69E4C201C13601F9&eid=03E56C113B4E5A88&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=1&reference_num=0