Microstructural characterization of Cu82.3Al8.3Mn9.4 shape memory alloy after rolling

Authors

  • Mirko Gojić University of Zagreb, Faculty of Metallurgy Sisak, Aleja narodnih heroja 3, 44103 Sisak
  • Stjepan Kožuh University of Zagreb, Faculty of Metallurgy Sisak, Aleja narodnih heroja 3, 44103 Sisak
  • Ivana Ivanić University of Zagreb, Faculty of Metallurgy Sisak, Aleja narodnih heroja 3, 44103 Sisak
  • Magdalena Selanec University of Zagreb, Faculty of Metallurgy Sisak, Aleja narodnih heroja 3, 44103 Sisak
  • Tamara Holjevac Grgurić University of Zagreb, Faculty of Metallurgy Sisak, Aleja narodnih heroja 3, 44103 Sisak
  • Borut Kosec University of Ljubljana, Faculty of Natural Science and Engineering, Aškerčeva 12, 1000, Ljubljana
  • Diana č†ubela Faculty of Metallurgy and Materials Science, Travnička cesta 1, 72000 Zenica
  • Omer Beganović Institute of Metallurgy -Kemal Kapetanović-, Travnička cesta 7, 72000 Zenica

DOI:

https://doi.org/10.30544/314

Keywords:

Shape memory alloy (SMA), continuously casting, microstructure, heat treatment, rolling.

Abstract

In this paper, the microstructure of Cu82.3Al8.3Mn9.4 (in wt. %) shape memory alloy after hot and cold rolling was investigated. The Cu82.3Al8.3Mn9.4 alloy was produced by a vertical continuous casting method in the form a cylinder rod of 8 mm in diameter. After the casting, hot and cold rolling was performed. By hot rolling a strip with a thickness of 1.75 mm was obtained, while by cold rolling a strip with a thickness of 1.02 mm was produced. After the rolling process, heat treatment was performed. Heat treatment was carried out by solution annealing at 900 °C held for 30 minutes and water quenched immediately after heating. The microstructure characterization of the investigated alloy was carried out by optical microscopy (OM), scanning electron microscopy (SEM) equipped with a device for energy dispersive spectroscopy (EDS). Phase transformation temperatures and fusion enthalpies were determined by differential scanning calorimetry (DSC) method. The homogenous martensite microstructure was confirmed by OM and SEM micrographs after casting. During rolling the two-phase microstructure occurred. Results of DSC analysis showed martensite start (Ms), martensite finish (Mf), austenite start (As) and austenite finish (Af) temperatures.

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Published

2017-09-30

How to Cite

Gojić, Mirko, Stjepan Kožuh, Ivana Ivanić, Magdalena Selanec, Tamara Holjevac Grgurić, Borut Kosec, Diana č†ubela, and Omer Beganović. 2017. “Microstructural Characterization of Cu82.3Al8.3Mn9.4 Shape Memory Alloy After Rolling”. Metallurgical and Materials Engineering 23 (3):281-89. https://doi.org/10.30544/314.