Dresden 2011 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 46: Mechanical Properties III

MM 46.4: Talk

Friday, March 18, 2011, 11:15–11:30, IFW D

Brittle-to-ductile transition of the intermetallic compound YCu — •Rolf Schaarschuch¹, Carl-Georg Oertel¹, Guanghui Cao², H.N. Tian², Jens Freudenberger³, Heinz-Günter Brokmeier⁴, and Werner Skrotzki¹ — ¹Institut für Strukturphysik, Technische Universität Dresden, 01062 Dresden, Germany — ²Department of Materials Engineering, Shanghai University, Shanghai 200072, P.R. China — ³Institute for Metallic Materials, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany — ⁴GKSS-Forschungszentrum Geesthacht GmbH, Max-Planck-Straße, 21494 Geesthacht, Germany

The temperature dependence of the tensile deformation behaviour of an extruded, polycrystalline YCu intermetallic compound with B2 structure at room temperature was investigated in the temperature range from room temperature down to 77K. The samples were deformed along the extrusion axis characterized by a weak <110>-fibre texture. The brittle-to-ductile transition (BDT) was found around 140K. The BDT is related to the transformation of the cubic B2 to the orthorhombic B27 structure proved by X-ray diffraction.