Anizotropno ponašanje toplo valjane trake tijekom hladne defromacije

master's thesis

• Title (english): Anisotropic behavior of hot rolled strip during cold deformation
• Author: Filip Skender
• Mentor: Stoja Rešković (mentor)
• Committee member: Ljerka Slokar Benić (predsjednik povjerenstva)
• Committee member: Stoja Rešković (član povjerenstva)
• Committee member: Ivan Jandrlić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2020-09-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

Čelik je danas najrasprostranjeniji materijal u svijetu. U svjetskoj proizvodnji čelika valjanje je najčešći proces deformacije. Posljednjih godina razvijaju se novi materijali i nove tehnologije oblikovanja deformacijom. Iz tog razloga nameće se potreba detaljnijeg poznavanja anizotropnih svojstava metalnih materijala, posebno čelika. U ovom radu istražena je anizotropija toplovaljane trake iz niskougljičnog čelika statičkim vlačnim pokusom, metalografskom analizom mikrostrukture, metodama termografije i digitalne korelacije slike, te numerički. Utvrđena je niska anizotropija toplovaljane trake, prihvatljiva za tehnologije dubokog izvlačenja. Posebno je istražen utjecaj stupnja deformacije na anizotropno ponašanje toplovaljane trake pri hladnoj deformaciji. Utvrđeno je da do ukupne deformacije od 30% ne postoji anizotropno ponašanje toplovaljane trake tijekom hladne deformacije. Nakon ukupne redukcije od 30% utvrđena je određena anizotropija tijekom hladne deformacije toplovaljane trake. Pokazalo se da su metode termografije i digitalne korelacije slike vrlo pogodne za istraživanje anizotropnog ponašanja toplovaljane trake kod hladne deformacije.

Abstract (english)

Steel is today the most widely used material in the world. In world steel production, rolling is the most common deformation process. In recent years, new materials and new deformation forming technologies have been developed. For this reason, there is need for more detailed knowledge of the anisotropic properties of metallic materials, especially steel.In this paper, anisotropy of hot rolled low carbon steel strip was investigated by static tensile test, metallographic analysis, thermography. digital image correlation and numerical.Low and acceptable anisotropy of hot rolled strip was determined for deep drawing technologies. In particular, the influence of the degree of deformation on the anisotropic behavior of hot rolled strip at cold deformation was investigated. It was found that up to a total deformation of 30% there is no anisotropic behavior of the hot rolled strip during cold deformation. After a total reduction of 30%, certain anisotropy was determined during the cold deformation of the hot-rolled strip. The methods of thermography and digital image correlation have been shown to be very suitable for investigating the anisotropic behavior of the hot spot strip in cold deformation

• Keywords: anizotropija; toplovaljana traka; niskougljični čelik; statički vlačni pokus; termografija; digitalna korelacija slike (DIC)
• Keywords (english): anisotropy; hot rolled strip; low carbon steel; static tensile test; thermography; digital image corelation (DIC)
• Language: croatian
• URN:NBN: urn:nbn:hr:115:909843
• Project: Number: IP-2016-06-1270; Title: Istraživanja početka plastičnog toka metala kod hladne deformacije; Acronym: MFSRIP062016; Leader: Stoja Rešković; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-10-13 10:23:41