Understanding of large auxetic properties of iron-gallium and iron-aluminum alloys

被引：28

作者：

Zhang, Yan-ning ^{[1
]}

Wu, Ru-qian ^{[1
]}

Schurter, Holly M. ^{[2
]}

Flatau, Alison B. ^{[2
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[2] Univ Maryland, Dept Aerosp Engn, College Pk, MD 20742 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 108卷 / 02期

关键词：

NEGATIVE POISSON RATIOS; FE-GA; MAGNETOSTRICTIVE PROPERTIES; ALPHA-CRISTOBALITE; CRYSTALS;

D O I：

10.1063/1.3445269

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Large auxetic properties of iron-gallium and iron-aluminum alloys have been investigated with both theoretical and experimental approaches. Tensile tests of single-crystal iron-gallium alloys with compositions of 12%-25% gallium were conducted to determine the composition dependent values of the Poisson's ratio. Systematic density functional calculations revealed a simple correlation between the Poisson's ratio and tetragonal shear modulus. We attribute the auxetic properties of these intermetallic alloys to the drastic reduction in C' with the presence of metalloid atoms in the DO(3)-type structures. (C) 2010 American Institute of Physics. [doi:10.1063/1.3445269]

引用

页数：6

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