Izvorni znanstveni članak
https://doi.org/10.15255/KUI.2022.011
Effect of Heat Treatment on Microstructure and Thermal Properties of Cu-based Shape Memory Ribbons
Stjepan Kožuh
; Sveučilište u Zagrebu, Metalurški fakultet, Aleja narodnih heroja 3, 44 000 Sisak
Ivana Ivanić
; Sveučilište u Zagrebu, Metalurški fakultet, Aleja narodnih heroja 3, 44 000 Sisak
Tamara Holjevac Grgurić
; Hrvatsko katoličko sveučilište, Ilica 242, 10 000 Zagreb, Hrvatska
Mirko Gojić
; Sveučilište u Zagrebu, Metalurški fakultet, Aleja narodnih heroja 3, 44 000 Sisak
Sažetak
The aim in this work was to investigate the change in microstructure, phase transformation temperatures, and thermal properties due to the quenching of the investigated Cu-Al-Mn and Cu-Al-Mn-Ti alloys in ribbon form. This paper presents the results of microstructure analysis and thermal properties of Cu-Al-Mn and Cu-Al-Mn-Ti shape memory alloys produced in ribbon form by melt spinning technique. The microstructural analysis was carried out before and after quenching. After casting of the investigated alloys, annealing at 900 °C for 30 min was performed, followed by water quenching. The microstructural analysis was carried out by optical and scanning electron microscopy equipped with an energy dispersive spectrometer and by X-ray diffractometer. Thermodynamic calculation of a ternary Cu-Al-Mn system in equilibrium condition was performed using Thermo-Calc 5 software. Phase transformation temperatures were determined by differential scanning calorimetry and electrical resistance measuring. The results of microstructural analysis show the presence of martensite microstructures before and after quenching in the Cu-Al-Mn alloy, while in the Cu-Al-Mn-Ti alloy martensite microstructure exists only after quenching. Phase transformation temperatures decreased after quenching and titanium addition.
Ključne riječi
Cu-Al-Mn; Cu-Al-Mn-Ti; shape memory alloys; microstructure characterisation; thermal analysis; X-ray spectroscopy
Hrčak ID:
283680
URI
Datum izdavanja:
21.9.2022.
Posjeta: 414 *