prikaz prve stranice dokumenta Utjecaj toplinske obrade na mehanička svojstva CuAlMn legure s prisjetljivosti oblika
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master's thesis
Utjecaj toplinske obrade na mehanička svojstva CuAlMn legure s prisjetljivosti oblika
Sisak: University of Zagreb, Faculty of Metallurgy, 2017. urn:nbn:hr:115:107268
Škrinjarić, Irbas
University of Zagreb
Faculty of Metallurgy

Institutional repository: Repository of Faculty of Metallurgy University of Zagreb

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Škrinjarić, I. (2017). Utjecaj toplinske obrade na mehanička svojstva CuAlMn legure s prisjetljivosti oblika (Master's thesis). Sisak: University of Zagreb, Faculty of Metallurgy. Retrieved from https://urn.nsk.hr/urn:nbn:hr:115:107268

Škrinjarić, Irbas. "Utjecaj toplinske obrade na mehanička svojstva CuAlMn legure s prisjetljivosti oblika." Master's thesis, University of Zagreb, Faculty of Metallurgy, 2017. https://urn.nsk.hr/urn:nbn:hr:115:107268

Škrinjarić, Irbas. "Utjecaj toplinske obrade na mehanička svojstva CuAlMn legure s prisjetljivosti oblika." Master's thesis, University of Zagreb, Faculty of Metallurgy, 2017. https://urn.nsk.hr/urn:nbn:hr:115:107268

Škrinjarić, I. (2017). 'Utjecaj toplinske obrade na mehanička svojstva CuAlMn legure s prisjetljivosti oblika', Master's thesis, University of Zagreb, Faculty of Metallurgy, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:115:107268

Škrinjarić I. Utjecaj toplinske obrade na mehanička svojstva CuAlMn legure s prisjetljivosti oblika [Master's thesis]. Sisak: University of Zagreb, Faculty of Metallurgy; 2017 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:115:107268

I. Škrinjarić, "Utjecaj toplinske obrade na mehanička svojstva CuAlMn legure s prisjetljivosti oblika", Master's thesis, University of Zagreb, Faculty of Metallurgy, Sisak, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:115:107268

Metadata
TitleUtjecaj toplinske obrade na mehanička svojstva CuAlMn legure s prisjetljivosti oblika
Title (english)The effect of heat treatment on mehanical properties of CuAlMn shape memory alloy
AuthorIrbas Škrinjarić
MentorStjepan Kožuh (mentor)
Committee memberMirko Gojić (predsjednik povjerenstva)
Committee memberStjepan Kožuh (član povjerenstva)
Committee memberTamara Holjevac-Grgurić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Metallurgy
Sisak
Defense date and country2017-02-24, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Metallurgy
Physical Metallurgy
Abstract
U ovom radu je prikazan utjecaj toplinske obrade na mikrostrukturu i mehanička svojstva CuAlMn legure s prisjetljivosti oblika. Legura kemijskog sastava Cu – 8,30 % Al – 9,4 % Mn (mas.%) je pripremljena iz čistih metala (>99,5 %), a zatim lijevana kontinuiranim vertikalnim postupkom u zaštitnoj atmosferi argona. Najprije je proizveden ingot (Ø 110 x 180 mm) koji je korišten kao ulazni materijal za lijevanje šipke promjera Ø 8 mm. Provedena su ispitivanja vlačne čvrstoće, granice razvlačenja, istezanja, kontrakcije i tvrdoće nakon lijevanja, kaljenja (900 °C/30'/H2O) i popuštanja (100 – 300 °C/60'/H2O). Mikrostrukturna karakterizacija uzoraka legure provedena je optičkom mikroskopijom (OM) i pretražnom elektronskom mikroskopijom (SEM) s EDS analizom. S pretražnim elektronskim mikroskopom je također provedena analiza prijelomnih površina. Nakon lijevanja CuAlMn legure vlačna čvrstoća je iznosila 627 MPa, istezanje 8,5% i kontrakcij a 17,88 %. U lijevanoj leguri utvrđena je djelomična prisutnost martenzitne faze dok je nakon kaljenja mikrostruktura u potpunosti bila martenzitna. Značajan porast vlačne čvrstoće i značajan pad istezanja uočeni su nakon popuštanja 200 °C/60'/H2O i 300 °C/60'/H2O.
Abstract (english)
This paper shows the effect of heat treatment on microstructure and mehanical properties of CuAlMn shape memory alloy. Alloy with the chemical composition of Cu – 8.30 Al – 9.4 % Mn (wt.%) was prepared from pure metals (>99.5 %) and then the alloy was casted by continuously vertical casting tehnique, under protective argon atmosphere. The prepared ingot (Ø 110 x 180 mm) was used as an input material for casting into 8 mm diameter bars. The tensile strength, yield strength, elongation, reduction in area, and hardness were examined after casting, quenching (900 °C/30'/H2O), and ageing (100 – 300 °C/60'/H2O). The samples were microstructurally analysed using optical microscopy (OM) and scanning electron microscopy (SEM) along with EDX analysis. Using scanning electron microscopy fracture surfaces were also tested. Test resulted in tensile strength of 627 MPa, elongation of 8.5% and reduction in area of 17.88% after casting of CuAlMn shape memory alloy. The alloys revealed some martensitic phase after casting, but after quenching microstructure was completely martensite. The tensile strength drastically increased and elongation drastically decreased after ageing at 200 °C/60'/H2O and 300 °C/60'/H2O.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:115:107268
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
Terms of useLicence In copyright icon
Created on2017-02-28 08:18:52