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master's thesis
Mikrostrukturna analiza CuAlMn legure s prisjetljivosti oblika
Sisak: University of Zagreb, Faculty of Metallurgy, 2022. urn:nbn:hr:115:846815
Bajutti, Dino
University of Zagreb
Faculty of Metallurgy

Institutional repository: Repository of Faculty of Metallurgy University of Zagreb

Cite this document

Bajutti, D. (2022). Mikrostrukturna analiza CuAlMn legure s prisjetljivosti oblika (Master's thesis). Sisak: University of Zagreb, Faculty of Metallurgy. Retrieved from https://urn.nsk.hr/urn:nbn:hr:115:846815

Bajutti, Dino. "Mikrostrukturna analiza CuAlMn legure s prisjetljivosti oblika." Master's thesis, University of Zagreb, Faculty of Metallurgy, 2022. https://urn.nsk.hr/urn:nbn:hr:115:846815

Bajutti, Dino. "Mikrostrukturna analiza CuAlMn legure s prisjetljivosti oblika." Master's thesis, University of Zagreb, Faculty of Metallurgy, 2022. https://urn.nsk.hr/urn:nbn:hr:115:846815

Bajutti, D. (2022). 'Mikrostrukturna analiza CuAlMn legure s prisjetljivosti oblika', Master's thesis, University of Zagreb, Faculty of Metallurgy, accessed 23 November 2024, https://urn.nsk.hr/urn:nbn:hr:115:846815

Bajutti D. Mikrostrukturna analiza CuAlMn legure s prisjetljivosti oblika [Master's thesis]. Sisak: University of Zagreb, Faculty of Metallurgy; 2022 [cited 2024 November 23] Available at: https://urn.nsk.hr/urn:nbn:hr:115:846815

D. Bajutti, "Mikrostrukturna analiza CuAlMn legure s prisjetljivosti oblika", Master's thesis, University of Zagreb, Faculty of Metallurgy, Sisak, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:115:846815

Metadata
TitleMikrostrukturna analiza CuAlMn legure s prisjetljivosti oblika
Title (english)Microstructural analysis of CuAlMn alloy with shape memory effect
AuthorDino Bajutti
MentorIvana Ivanić (mentor)
Committee memberStjepan Kožuh (predsjednik povjerenstva)
Committee memberIvana Ivanić (član povjerenstva)
Committee memberMirko Gojić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Metallurgy
Sisak
Defense date and country2022-08-31, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Metallurgy
Abstract
U ovom radu provedena je mikrostrukturna analiza CuAlMn legure kemijskog sastava Cu – 8,2% Al – 8,3% Mn (mas %). Dobivena legura s prisjetljivosti oblika podvrgnuta je postupku kovanja i toplinske obrade. Toplinska obrada šipke nakon kovanja promjera 13 – 14 mm sastojala se od žarenja 870 °C/20 minuta uz hlađenje u pijesku i od žarenja na 870 °C/20 minuta uz hlađenje u vodi. Mikrostrukturna analiza lijevanog stanja CuAlMn legure provedena je optičkom i pretražnom elektronskom mikroskopijom te energetsko disperzijskom spektroskopijom. Nakon kovanja i toplinske obrade mikrostrukturna analiza provedena je optičkom mikroskopijom. Rezultati su pokazali kako je mikrostruktura CuAlMn legure žarene na 870 °C/20´ i hlađene u pijesku krupnozrnata dvofazna (α+β), dok je mikrostruktura CuAlMn legure žarene na 870 °C/20´ i hlađene u vodi krupnozrnata martenzitna mikrostruktura. Putem optičke mikroskopije primjećene su pukotine u CuAlMn leguri. Ispitivanje makrotvrdoće provedeno je Brinell-ovom metodom, a rezultati pokazuju niže vrijednosti makrotvrdoće pri hlađenju u vodi za razliku od hlađenja u pijesku.
Abstract (english)
In this work, a microstructural analysis of CuAlMn alloy with chemical composition Cu - 8.2% Al - 8.3% Mn (wt.%) was performed. The resulting shape memory alloy was subjected to a forging and heat treatment process. The heat treatment of the bar after forging with a diameter of 13 – 14 mm consisted of annealing at 870 °C/20 minutes with cooling in sand and of annealing at 870 °C/20 minutes with cooling in water. Microstructural analysis of the as cast state of CuAlMn alloy was performed by optical and scanning electron microscopy and energy dispersive spectroscopy. After forging and heat treatment, microstructural analysis was performed by optical microscopy. The results showed that the microstructure of CuAlMn alloy annealed at 870 °C/20´ and cooled in sand has a large grained two phases (α+β), while the microstructure of CuAlMn alloy annealed at 870 °C /20´ and cooled in water was a large grained martensitic microstructure. Cracks in the CuAlMn alloy were observed by optical microscopy. The macrohardness test was performed by the Brinell method, and the results show lower values of macrohardness during cooling in water unlike cooling in sand.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:115:846815
Study programmeTitle: Graduate study program Metallurgy
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka metalurgije (magistar/magistra inženjer/inženjerka metalurgije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2022-08-21 15:25:51