Izvorni znanstveni članak
https://doi.org/10.15255/CABEQ.2023.2186
Effect of Silver Addition on Cu-based Shape Memory Alloys
L. Liverić
; University of Rijeka, Faculty of Engineering, Vukovarska 58, 51 000 Rijeka, Croatia
T. Holjevac Grgurić
; Catholic University of Croatia, School of Medicine, Ilica 242, 10 000 Zagreb, Croatia
E. Govorčin Bajsić
; University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev trg 19, 10 000 Zagreb, Croatia
M. Kršulja
; Juraj Dobrila University of Pula, Department of Engineering, Zagrebačka 30, 52 100 Pula
Sažetak
Shape memory alloys (SMAs) are smart materials with unique properties of superelasticity and shape memory effect. These properties are the consequence of thermoelastic martensitic transformation, which can occur under thermal or mechanical deformation. Cu-Al-Ag alloys have high temperatures of martensite transformation, unlike other SMAs, which makes them suitable for use in specific applications. In this paper, Cu-10Al-1Ag alloy was prepared by melting pure metals in an electric arc furnace and casting the melt in a cylindrical mold. The microstructure of the as-cast and quenched material was determined by optical microscopy (OM) and scanning electron microscopy (SEM) equipped with energy dispersive analysis (EDS). X-ray diffraction (XRD) analysis was performed to identify crystal phases in the microstructure, while transformation temperatures were determined by differential scanning calorimetry (DSC).
The hardness of Cu-Al-Ag SMA was also determined with a microhardness tester. The results showed partially formed martensite in the as-cast state, and fully formed martensite structure, 18R-type, in the quenched Cu-10Al-1Ag alloy.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Ključne riječi
shape memory alloys; Cu-Al-Ag alloys; microstructure; phase transformations; martensite
Hrčak ID:
308401
URI
Datum izdavanja:
4.10.2023.
Posjeta: 258 *