Transmission electron microscopy investigation of B27 martensitic phase in polycrystalline YCu intermetallic compound

被引：3
作者：
Cao, G. H. [1 ,2 ]
Schaarschuch, R. [2 ]
Oertel, C-G [2 ]
Skrotzki, W. [2 ]
机构：
[1] Shanghai Univ, Dept Mat Engn, Shanghai 200072, Peoples R China
[2] Tech Univ Dresden, Inst Strukturphys, D-01062 Dresden, Germany
来源：
CRYSTAL RESEARCH AND TECHNOLOGY | 2012年 / 47卷 / 01期
基金：
中国国家自然科学基金;
关键词：
intermetallics; martensitic phase transformation; microstructure; TEM; YCu; MECHANICAL-PROPERTIES; FRACTURE-TOUGHNESS; SLIP SYSTEMS; ALLOYS; DEFORMATION; MICROSTRUCTURE; DUCTILITY; YAG;
D O I：
10.1002/crat.201100378
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Polycrystalline YCu specimens with a CsCl-type B2 structure made by induction melting were investigated by transmission electron microscopy (TEM). TEM studies show that an orthorhombic YCu B27 martensite with FeB-type structure having lattice parameters a = 0.71 nm, b = 0.45 nm and c = 0.54 nm forms during deformation at ambient temperature. (101) twins are observed in the YCu B27 phase. The orientation relationship of B27 with B2 matrix is (001)[1 (1) over bar0](B27) (112)[1 (1) over bar0](B2). Effects of B27 phase formation on the ductility of YCu alloy are discussed. (c) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
引用
收藏
页码：13 / 18
页数：6
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