Naslov
Kontinuirno litje zlitine z oblikovnim spominom Cu-Al-Ni
(Continuous casting of Cu-Al-Ni shape memory alloys)

Autori
Lojen, Gorazd ; Kneissl, Albert C. ; Gojić, Mirko ; Rudolf, Rebeka ; Čolić, Miodrag ; Anžel, Ivan

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

Izvornik
Conference Proceedings of International 49th Foundry Conference Portorož / Debelak, Martin - Ljubljana : Slovenian Foundrymen Society, 2009

ISBN
978-961-90130-4-5

Skup
International 49th Foundry Conference Portorož 2009

Mjesto i datum
Portorož, Slovenija, 09.09.2009. - 11.09.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Spominske zlitine; Cu-Al-Ni; kontinuirno litje; mikrostruktura; mehanske lastnosti
(Shape Memory Alloys; Cu-Al-Ni; Continuous Casting; Microstructure; Mechanical Properties)

Sažetak
Shape memory alloys, especially polycrystalline, have some disadvantages compared to Ni-Ti alloys. The most important one is brittleness, and consequently, smaller reversible deformation. But on the other hand, Cu-Al-Ni alloys have also some preferable properties: melting, casting, composition control and machining are less demanding, they have higher Young’ s modulus, higher resistance to degradation of functional properties and better cost-to-work ratio. But processing of slabs and ingots is still work- and time consuming because of brittleness. Therefore, manufacturing of half-finished products of smaller cross-sections directly from the melt could considerably lower the costs. In spite of that, in the literature no reports about continuous casting of shape memory alloys could be found. Our research should diminish this blank. In the first experiments Cu – 13 wt. % Al – 4 wt. % Ni shape memory alloy was continuously cast. A laboratory device for vertical continuous casting directly from the melting crucible was employed. The graphite mould had a diameter of 16 mm and diverse sets of casting parameters were tested. The average casting speeds were in the range from 250 to 625 mm per minute. Castability of the alloy appeared to be good. In the paper the surface quality, microstructures and some mechanical properties of the cast rods are discussed.

Izvorni jezik
Slv

Znanstvena područja
Metalurgija

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