Effect of heat treatment on microstructure and thermal properties of Cu-based shape memory ribbons

Scientific paper - Original scientific paper

• Author: Stjepan Kožuh
• Author: Ivana Ivanić
• Author: Tamara Holjevac Grgurić
• Author: Mirko Gojić
• Author's institution: University of Zagreb; Faculty of Metallurgy; (Department of Physical Metallurgy); (Laboratory of Materials Development and Application)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract (english)

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 ribbons 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 form of ribbons 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 by 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 were decreased after quenching and titanium addition.

• Keywords (english): Cu-Al-Mn; Cu-Al-Mn-Ti; shape memory alloys; microstructure characterization; thermal analysis; X-ray spectroscopy
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Kemija u industriji : Časopis kemičara i kemijskih inženjera Hrvatske
• Numbering: vol. 71, no. 9-10, pp. 591-600
• p-ISSN: 0022-9830
• e-ISSN: 1334-9090
• DOI: https://doi.org/10.15255/KUI.2022.011
• URN:NBN: urn:nbn:hr:115:190654
• Publication: 2022
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-04-29 07:40:16