| Autor: |
Gojić, Mirko, Kožuh, Stjepan, Anžel, Ivan, Lojen, Gorazd, Ivanić, Ivana, Kosec, Borut |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Materiali in tehnologije, vol. 47, no. 2, pp. 149-152, 2013. |
| ISSN: |
1580-2949 |
| Popis: |
The results of the characterization of a CuAlNi shape-memory alloy after continuous casting technology are shown. Using this procedure a bar with a diameter of 8 mm was manufactured. After solidification of the alloy the microstructure characterization was carried out using optic microscopy (OM), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) methods. Our results showed that the as-cast alloy consisted of the parent β1 and β1’ martensite phases. The martensite phase primary as the needle-like inside grains was observed. Martensite laths have different orientations inside particular grains. It was found that the average grains size is 98.78 µm. The grain diameter near to the external surface is higher than in the center. The average hardness of the alloy was 275 HV1. Prikazani so rezultati karakterizacije spominske zlitine CuAlNi po postopku kontinuirnega litja. Po navedeni proceduri so bile izdelane palice premera 8 mm. Po strjevanju zlitine je bila izvedena karakterizacija mikrostrukture z uporabo metod optične mikroskopije (OM), vrstične elektronske mikroskopije (SEM), diferencialne vrstične kalorimetrije (DSC) in rentgenske strukturne analize (XRD). Rezultati so pokazali, da lita zlitina sestoji iz izhodne faze β1 in martenzitne faze β1’. Opažena je bila martenzitna faza v obliki iglic v primarnih zrnih. Letve martenzita imajo različne orientacije v posameznih zrnih. Ugotovili smo, da je srednja velikost zrn 98,78 µm. Premer zrn v v bližini zunanje površine je večji kot v centru. Srednja trdota zlitine je bila 275 HV1. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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