Naslov
The properties of shape memory alloys CuAlNi after continuous casting

Autori
Gojić, Mirko ; Matković, Prosper ; Matković, Tanja ; Kneissl, A. C. ; Anžel, Ivan ; Lojen, Gorazd ; Bizjak, Milan ; Kosec, Borut

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings Book of 9th International Foundrymen Conference / Unkić, Faruk - Sisak : Metalurški fakultet Sveučilišta u Zagrebu, 2009, 34-2009

ISBN
978-953-7082-08-6

Skup
Innovative Materials and Advanced Concepts of Metal Casting Production

Mjesto i datum
Opatija, Hrvatska, 18.06.2009. - 19.06.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
shape memory alloys ; microstructure ; martensite ; hardness

Sažetak
In this work, the results of microstructure and phase transformation of the Cu-Al-Ni shape memory alloy (SMA) were presented. The alloy was tested by optical microscopy, using scanning electron microscopy and the differential scanning calorimetry (DSC) methods. Also hardness was measured. Samples for analysis are obtained using induction melting in the vacuum furnace. Remelted alloy is continuous casted by means of vertical device for casting in the cylindrical rods with diameter 16 mm at different speed of casting (255- 625 mm/min.). After cooling of the alloy the martensite phase primary as the needle-like into grains was observed. The columnar structure is presented near the outer surface of the samples. The As, Af, Ms and Mf temperatures are determined by the DSC method. It was found that, if the speed of casting increases then the grain size decreases. Also, the average grain diameter at the external surface and into the center are different. It was found that the average grain diameter near to the external surface was 489-229 mm, while into the center it was 212-182 mm.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija

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