Značajna plastična deformacija postupkom kutne ekstruzije

Rožman, Mirko (2016) Značajna plastična deformacija postupkom kutne ekstruzije. = Severe plastic deformation by Equal Channel process. Undergraduate thesis , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Keran, Zdenka.

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Abstract (Croatian)

Neprestanim napretkom i razvojem znanosti te zbog sve rigoroznijih zahtjeva tehnologije, javlja se izrazita potreba za novim materijalima, boljih mehaničkih svojstava, a istovremeno male mase. Istraživanja poboljšavanja mehaničkih svojstava plastičnom deformacijom dovela su do otkrivanja postupaka značajne plastične deformacije (eng. Severe Plastic Deformation, SPD). Kutna ekstruzija najzastupljeniji je od postupaka značajne plastične deformacije, kojim se obrađuju metalni predmeti u svrhu postizanja sitnozrnate mikrostrukture, a samim time i boljih mehaničkih svojstava materijala i odabrana je za temu ovoga rada. U radu je detaljno pojašnjen princip značajne plastične deformacije i neki od postupaka. Posebna pozornost posvećena je postupku kutne ekstruzije, alatima potrebnima za njegovo izvođenje, režimima obrade te promjenama na materijalu koji se obrađuje.

Abstract

With the continuous progress and development of science and as a result of stricter technology requirements, a need for new lightweight materials with better mechanical properties has occured. Researches of improving mechanical properties by plastic deformation have brought up to invention of severe plastic deformation (SPD) processes. Equal channel angular pressing (ECAP) is one of the most significant SPD process, which is used to deform metal materials and to develop grain refinement which causes mechanical properties improvement, and is selected as a topic of this paper. In the paper, the principle of severe plastic deformation is explained as well as some of the processes. Special attention is dedicated to equal channel angular pressing process, required tools for its execution, processing parameters and occuring changes in the processed material.

Item Type:	Thesis (Undergraduate thesis)
Uncontrolled Keywords:	obrada metala; značajna plastična deformacija; kutna ekstruzija
Keywords (Croatian):	metal processing; severe plastic deformation; equal channel angular pressing
Subjects:	TECHNICAL SCIENCE > Mechanical Engineering
Divisions:	1200 Department of Technology > 1220 Chair of Metal Forming
Date Deposited:	19 Sep 2016 10:19
Last Modified:	19 Sep 2016 10:19
URI:	http://repozitorij.fsb.hr/id/eprint/6292

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