Phase transformation and microstructure study of the as-cast Cu-rich Cu-Al-Mn ternary alloys

J. Min. Metall. Sect. B-Metall. 53 (3) B (2017) 413-422. DOI:10.2298/JMMB170809039H
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Four Cu-rich alloys from the ternary Cu-Al-Mn system were prepared in the electric-arc furnace and casted in cylindrical moulds with dimensions: =8 mm and length 12 mm. Microstructural investigations of the prepared samples were performed by using optical microscopy (OM) and scanning electron microscopy, equipped by energy dispersive spectroscopy (SEM-EDS). Assignation of crystalline phases was confirmed by XRD analysis. Phase transition temperatures were determined using simultaneous thermal analyzer STA DSC/TG. Phase equilibria calculation of the ternary Cu-Al-Mn system was performed using optimized thermodynamic parameters from literature. Microstructure and phase transitions of the prepared as-cast alloys were investigated and experimental results were compared with the results of thermodynamic calculations.
Keywords: Cu-Al-Mn alloys; SMA alloys; Microstructure; Phase transformations
Correspondence Address:
T. Holjevac Grgurić,
Faculty of Metallurgy,
University of Zagreb, Sisak, Croatia
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