Transmission electron microscopy investigation of B27 martensitic phase in polycrystalline YCu intermetallic compound
✍ Scribed by G. H. Cao; R. Schaarschuch; C.-G. Oertel; W. Skrotzki
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 266 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0232-1300
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✦ Synopsis
Abstract
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)