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

  • 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, Aškerčeva 12, 1000, Ljubljana
  • Diana Ćubela Faculty of Metallurgy and Materials Science, Travnička cesta 1, 72000 Zenica
  • Omer Beganović Institute of Metallurgy “Kemal Kapetanović”, Travnička cesta 7, 72000 Zenica
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.

References

C. Lexcellent, Shape-memory Alloys Handbook. New York, John Wiley&Sons 2013. LINK

J. M. Jani, M. Leary, A. Subic, M. A. Gibson: Mater Des, 56 (2014) 1078-1113. LINK

D. Ćorić, M. Franz: Zavarivanje, 5-6 (2007) 179-187. LINK

G. Lojen, I. Anžel, A.C. Kneissl, A. Križman, E. Unterweger, B. Kosec, M. Bizjak: J Mater Process Technol, 162-163 (2005) 220-229. LINK

W. Huang: Mater Des, 23 (2002) 11-19. LINK

S. Zeghdane, K. Necib, A. Britah: EPJ Web of Conferences, 6 (2010) 1-9, LINK

R. Kainuma, S. Takahashi, K. Ishida: Metall Mater Trans A, 27A (1996) 2187-2195. LINK

M.R. Rezvani, A. Shokuhfar: Mater Sci Eng A, 532 (2012) 282-286. LINK

U.S. Mallik, V. Sampath: J Alloys Compd, 469 (2009) 156-163. LINK

J. Chen, Z. Li, Y.Y. Zhao: J Alloys Compd, 480 (2009) 481-484. LINK

G. Lojen, A.C. Kneissl, M. Gojić, R. Rudolf, M. Čolić, I. Anžel: Livarski vestnik, 57 (2010) 172-193. LINK

M. Gojić, L. Vrsalović, S. Kožuh, A.C. Kneissl, I. Anžel, S. Gudić, B. Kosec, M. Kliškić: J Alloys Compd, 509 (2011) 9782-9790. LINK

Y.Q. Jiao, Y.H. Wen, N. Li, J.Q. He, J, Teng: J Alloys Compd, 491 (2010) 627-630. LINK

Published
2017-09-30