Mechanism of Macroalloying-induced Ductility in Ni3Al

被引：1
|
作者：
Changgong MENG
Jianting GUO and Zhuangqi HU (Institute of Metal Research
机构：
来源：
JournalofMaterialsScience&Technology | 1994年 / 04期
关键词：
Mechanism of Macroalloying-induced Ductility in Ni3Al; AIME; Ni;
D O I：
暂无
中图分类号：
O614 [金属元素及其化合物];
学科分类号：
070301 ; 081704 ;
摘要：
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
引用
收藏
页码：279 / 284
页数：6
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