Transmission electron microscopy investigation of B27 martensitic phase in polycrystalline YCu intermetallic compound
Transmission electron microscopy investigation of B27 martensitic phase in polycrystalline YCu intermetallic compound
复制标题
DOI：
10.1002/crat.201100378
复制
发表时间：
2012-01
影响因子：
1.5
通讯作者：
G. Cao;R. Schaarschuch;C. Oertel;W. Skrotzki
中科院分区：
文献类型：
--
作者：
G. Cao;R. Schaarschuch;C. Oertel;W. Skrotzki
用透射电子显微镜（TEM）研究了感应熔炼制备的CsCl-型B2结构的多晶YCu样品。TEM研究表明，在室温变形过程中形成了具有Fe B-型结构的正交YCu B27马氏体，其晶格参数为a = 0.71 nm，B = 0.45 nm，c = 0.54 nm。(101)在YCu B27相中观察到孪晶。B27与B2矩阵的取向关系为（001）[1$ \bar 1 $0]B27 <$（112）[1$ \bar 1 $0]B2。讨论了B27相的形成对YCu合金塑性的影响。（© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
Polycrystalline YCu specimens with a CsCl‐type B2 structure made by induction melting were investigated by transmission electron microscopy (TEM). TEM studies show that an orthorhombic YCu B27 martensite with FeB‐type structure having lattice parameters a = 0.71 nm, b = 0.45 nm and c = 0.54 nm forms during deformation at ambient temperature. (101) twins are observed in the YCu B27 phase. The orientation relationship of B27 with B2 matrix is (001)[1$ \bar 1 $0]B27 ‖ (112)[1$ \bar 1 $0]B2. Effects of B27 phase formation on the ductility of YCu alloy are discussed. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)