prikaz prve stranice dokumenta Karakteristike pojave Portevin-Le Chatelier efekta kod AlMg legura tijekom hladne deformacije
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master's thesis
Karakteristike pojave Portevin-Le Chatelier efekta kod AlMg legura tijekom hladne deformacije
Sisak: University of Zagreb, Faculty of Metallurgy, 2022. urn:nbn:hr:115:984493
Kovačević, Domagoj
University of Zagreb
Faculty of Metallurgy

Institutional repository: Repository of Faculty of Metallurgy University of Zagreb

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Kovačević, D. (2022). Karakteristike pojave Portevin-Le Chatelier efekta kod AlMg legura tijekom hladne deformacije (Master's thesis). Sisak: University of Zagreb, Faculty of Metallurgy. Retrieved from https://urn.nsk.hr/urn:nbn:hr:115:984493

Kovačević, Domagoj. "Karakteristike pojave Portevin-Le Chatelier efekta kod AlMg legura tijekom hladne deformacije." Master's thesis, University of Zagreb, Faculty of Metallurgy, 2022. https://urn.nsk.hr/urn:nbn:hr:115:984493

Kovačević, Domagoj. "Karakteristike pojave Portevin-Le Chatelier efekta kod AlMg legura tijekom hladne deformacije." Master's thesis, University of Zagreb, Faculty of Metallurgy, 2022. https://urn.nsk.hr/urn:nbn:hr:115:984493

Kovačević, D. (2022). 'Karakteristike pojave Portevin-Le Chatelier efekta kod AlMg legura tijekom hladne deformacije', Master's thesis, University of Zagreb, Faculty of Metallurgy, accessed 15 November 2024, https://urn.nsk.hr/urn:nbn:hr:115:984493

Kovačević D. Karakteristike pojave Portevin-Le Chatelier efekta kod AlMg legura tijekom hladne deformacije [Master's thesis]. Sisak: University of Zagreb, Faculty of Metallurgy; 2022 [cited 2024 November 15] Available at: https://urn.nsk.hr/urn:nbn:hr:115:984493

D. Kovačević, "Karakteristike pojave Portevin-Le Chatelier efekta kod AlMg legura tijekom hladne deformacije", Master's thesis, University of Zagreb, Faculty of Metallurgy, Sisak, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:115:984493

Metadata
TitleKarakteristike pojave Portevin-Le Chatelier efekta kod AlMg legura tijekom hladne deformacije
Title (english)Characteristics of the appearance of the Portevin-Le Chatelier effect in AlMg alloys during cold deformation
AuthorDomagoj Kovačević
MentorIvan Jandrlić (mentor)
MentorLorena Mrkobrada (pomoć pri izradi, neposredni voditelj)
Committee memberIvana Ivanić (predsjednik povjerenstva)
Committee memberIvan Jandrlić (član povjerenstva)
Committee memberTin Brlić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Metallurgy
Sisak
Defense date and country2022-10-26, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Metallurgy
Abstract
Aluminij i aluminijske legure su posljednjih godina postali nezamjenjiv materijal u mnogim industrijama. Neke legure aluminija pokazuju lokaliziranu deformaciju, takozvani Portevin-Le Chatelier efekt pri određenim brzinama deformacije i temperaturama. Takva lokalizirana deformacija uzrokuje razne probleme u industriji. Iz tog razloga je potrebno saznati više o Portevin-Le Chatelier efektu. U ovom radu istraživana je karakteristika pojave Portevin-Le Chatelier efekta kod AlMg legure tijekom hladne deformacije metodama statičkog vlačnog pokusa, termografije, digitalne korelacije slike (DIC) i metalografskom analizom mikrostrukture. Istraživanjem je utvrđena pojava Portevin-Le Chatelier efekta kod AlMg legure. Metodom digitalne korelacije slike je utvrđeno kako je pojava Portevin-Le Chatelier efekta brza i jasno uočljiva na DIC videu te kako dolazi do skokovitih promjena u deformaciji. Iz rezultata dobivenih metodom termografije je utvrđeno da tijekom skokovitog porasta u deformaciji dolazi do skokovitog porasta u temperaturi. Utvrđeno je da su skokovite promjene u deformaciji i temperaturi međusobno povezane. Ispitivanjem mikrostrukture je utvrđeno da je ispred PLC linije lijevana struktura, a na samoj liniji fronte dolazi do znatne deformacije i preorijentiranja zrna u smjeru razvlačenja.
Abstract (english)
In recent years, aluminum and aluminum alloys have become an irreplacable material in many industries. Some aluminum alloys exhibit localized deformation, the so-called Portevin-Le Chatelier effect, at certain deformation rates and temperatures. Such localized deformation causes various problems in industry. For this reason, it is necessary to learn more about Portevin-Le Chatelier effect. In this paper, the characteristics of the appearance of the PortevinLe Chatelier effect in AlMg alloys during cold deformation were investigated by static tensile test, thermography, digital image correlation and metallographic microstructure analysis. Research determined the occurence of the Portevin-Le Chatelier effect in the investigated AlMg alloy. Using the digital image correlation, it was determined that the appearance of the PortevinLe Chatelier effect is fast and clearly visible phenomenon on the DIC video, and that during it sudden changes in deformation occur. During analysis using thermography method, it was determined that there are sudden increase in temperature. It was determined that sudden changes in deformation and in temperature are connected. Investigation of the microstructure revealed that in front of the PLC line there is a casting structure, at the front line itself there is considerable deformation and reorienation of the grains in the direction of stretching.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:115:984493
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 Attribution 4.0 International (CC BY 4.0) icon
Created on2022-10-17 13:38:24