Structural evolution in Ti-Cu-Ni metallic glasses during heating

P. Gargarella (1, 2) , S. Pauly (1) , M. Stoica (1) , G. Vaughan (3) , C. R. M. Afonso (2) , U. Kuehn (1) , J. Eckert (1, 4)

1 IFW Dresden - Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden
2 Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP, Brazil
3 ESRF - European Synchrotron Radiation Facility
4 Tech Univ Dresden, Inst Werkstoffwissensch, D-01062 Dresden, Germany

The structural evolution of Ti50Cu43Ni7 and Ti55Cu35Ni10 metallic glasses during heating was investigated by in-situ synchrotron X-ray diffraction. The width of the most intense diffraction maximum of the glassy phase decreases slightly during relaxation below the glass transition temperature. Significant structural changes only occur above the glass transition manifesting in a change in the respective peak positions. At even higher temperatures, nanocrystals of the shape memory B2-Ti(Cu, Ni) phase precipitate, and their small size hampers the occurrence of a martensitic transformation. (C) 2015 Author(s)

Domaines: Physique [physics]

P. Gargarella, S. Pauly, M. Stoica, G. Vaughan, C. R. M. Afonso, et al.. Structural evolution in Ti-Cu-Ni metallic glasses during heating. APL Materials, 2015, 3 (1), 6 p. ⟨10.1063/1.4905287⟩. ⟨hal-01572939⟩