Mechanical properties of single crystal YCu and (Tb0.88Dy0.12)Zn B2 intermetallic compounds

被引：48

作者：

Russell, AM ^{[1
]}

Zhang, Z

Gschneidner, KA

Lograsso, TA

Pecharsky, AO

Slager, AJ

Kesse, DC

机构：

[1] Iowa State Univ, USDOE, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

[3] Bell Helicopters Textron, Ft Worth, TX USA

来源：

INTERMETALLICS | 2005年 / 13卷 / 06期

关键词：

rare-earth intermetallics; mechanical properties at ambient temperature; plastic deformation mechanisms; phase transformations; fracture mode;

D O I：

10.1016/j.intermet.2004.09.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Single crystal specimens of YCu with the B2-type crystal structure were tested in tension and in compression, and the isostructural single crystal specimens of 132 (Tb0.88Dy0.12)Zn were tested in tension. The YCu tensile specimens elongated several percent before fracture. The active slip systems in YCu in tension were found to be {100}< 010 > (tau(CRSS) = 17 MPa) and {110}< 010 > (tau(CRSS) = 18 MPa). Specimens of single crystal YCu were compression tested with the (100) direction as the compression axis, an orientation that puts no resolved shear stress on either the {100}< 010 > or the {110}< 010 >. These compression tests resulted in high yield stresses followed by what is believed to be a stress induced transformation to another crystallographic structure of YCu, the B27-type crystal structure. All specimens of (Tb0.88Dy0.12)Zn failed by brittle fracture. (c) 2004 Elsevier Ltd. All rights reserved.

引用

页码：565 / 571

页数：7

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