First-principles study of magnetic effect on the mechanical properties of Ni-rich NiAl with alloying elements

被引：6

作者：

Xing, H. ^{[1
]}

Huang, J. ^{[2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

[2] Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USA

来源：

MATERIALS LETTERS | 2017年 / 187卷

基金：

中国国家自然科学基金;

关键词：

Intermetallic alloys and compounds; Simulation and modeling; Mechanical properties; Magnetism; INTERMETALLIC ALLOYS; TEMPERATURE; DUCTILITY; TENSILE; SYSTEMS; FE;

D O I：

10.1016/j.matlet.2016.08.101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using first-principles supercell calculation, we studied the magnetism-induced effect in Ni-rich NiAl alloys with X=Mn/Cr/Fe/Co additions. The critical stress to activate < 001 > dislocations was estimated and it decreases with X additions in magnetic Ni(Al,X) alloys. The magnetic additions reduce the < 001 > {110} generalized stacking fault energies (gamma(GSF)) but increase the < 111 > {110} gamma(GSF) of Ni(Al,X) compared to Ni-rich NiAl alloys. Magnetism plays a clear role in the brittleness of these alloys and shows linear relationships with several material properties.

引用

页码：80 / 82

页数：3

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