Role of crystalline precipitates on the mechanical properties of (Cu0.50Zr0.50)100-xAlx (x=4, 5, 7) bulk metallic glasses

JOURNAL OF ALLOYS AND COMPOUNDS

卷:509

Article; Proceedings Paper

Castellero, A.^1,2  Baser, T. A.^1,2,3  Das, J.^4,5  Matteis, P.⁶  Eckert, J.^4,7  Battezzati, L.^1,2  Baricco, M.^1,2 

[1] Univ Turin, Dipartimento Chim IFM, I-10125 Turin, Italy

[2] Univ Turin, NIS, I-10125 Turin, Italy

[3] EMPA Swiss Fed Labs Mat Testing & Res, Dubendorf, Switzerland

[4] IFW Dresden, Inst Komplexe Mat, D-01069 Dresden, Germany

[5] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India

[6] Politecn Torino, DISMIC, I-10129 Turin, Italy

[7] Tech Univ Dresden, Inst Werkstoffwissensch, D-01062 Dresden, Germany

关键词: Bulk metallic glasses;    Amorphization;    Composite;    Mechanical properties;    Reliability;   

DOI  :  10.1016/j.jallcom.2011.01.085

来源: Elsevier

【 摘 要 】

The mechanical behaviour upon compression of (Cu0.50Zr0.50)(100-x)Al-x (x = 4, 5, 7) rods with 2 and 3mm diameter was systematically studied and compared with the literature data. Fully amorphous bulk metallic glasses (x = 5, 7) show little permanent deformation and reproducible yield stress values. The remarkable fracture strain, observed for some apparently X-ray diffraction amorphous samples (x = 4), was found to be due to significant amounts (at least 20%) of the B2-CuZr crystalline phase. The effect of possible flaws on the external surface of the rods was evaluated by mechanical testing of either as cast and machined samples. (C) 2011 Elsevier B.V. All rights reserved.

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