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doctoral thesis
Utjecaj stacionarnog autogenog TIG procesa zavarivanja na profil penetracije kod nehrđajućeg austenitnog čelika 316L
Split: University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:179:477338
Kojundžić, Domagoj
University of Split
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
Department of Mechanical Engineering Technology

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Kojundžić, D. (2023). Utjecaj stacionarnog autogenog TIG procesa zavarivanja na profil penetracije kod nehrđajućeg austenitnog čelika 316L (Doctoral thesis). Split: University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:179:477338

Kojundžić, Domagoj. "Utjecaj stacionarnog autogenog TIG procesa zavarivanja na profil penetracije kod nehrđajućeg austenitnog čelika 316L." Doctoral thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:179:477338

Kojundžić, Domagoj. "Utjecaj stacionarnog autogenog TIG procesa zavarivanja na profil penetracije kod nehrđajućeg austenitnog čelika 316L." Doctoral thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:179:477338

Kojundžić, D. (2023). 'Utjecaj stacionarnog autogenog TIG procesa zavarivanja na profil penetracije kod nehrđajućeg austenitnog čelika 316L', Doctoral thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, accessed 13 January 2025, https://urn.nsk.hr/urn:nbn:hr:179:477338

Kojundžić D. Utjecaj stacionarnog autogenog TIG procesa zavarivanja na profil penetracije kod nehrđajućeg austenitnog čelika 316L [Doctoral thesis]. Split: University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture; 2023 [cited 2025 January 13] Available at: https://urn.nsk.hr/urn:nbn:hr:179:477338

D. Kojundžić, "Utjecaj stacionarnog autogenog TIG procesa zavarivanja na profil penetracije kod nehrđajućeg austenitnog čelika 316L", Doctoral thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:179:477338

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Metadata
TitleUtjecaj stacionarnog autogenog TIG procesa zavarivanja na profil penetracije kod nehrđajućeg austenitnog čelika 316L
Title (english)Influence of stationary autogenous TIG welding process on the penetration profile for 316L austenitic stainless steel
AuthorDomagoj Kojundžić
MentorNikša Krnić (mentor)
Committee memberDražen Bajić (predsjednik povjerenstva)
Committee memberZoran Kožuh (član povjerenstva)
Committee memberIvan Samardžić (član povjerenstva)
Committee memberSandro Nižetić https://orcid.org/0000-0001-6896-4605 (član povjerenstva)
Committee memberSonja Jozić https://orcid.org/0000-0002-7570-5799 (član povjerenstva)
GranterUniversity of Split
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
(Department of Mechanical Engineering Technology)
Split
Defense date and country2023-02-13, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Production Mechanical Engineering
Universal decimal classification
(UDC)		621 - Mechanical engineering. Nuclear technology. Machinery
Abstract
U ovoj doktorskoj disertaciji istražen je utjecaj stacionarnog autogenog TIG procesa zavarivanja na profil penetracije kod nehrđajućeg austenitnog čelika 316L. Treba istaknuti kako su ponavljanjem eksperimenata pod jednakim zavarivačkim parametrima utvrđena značajna odstupanja u dubini penetracije unatoč tome što uzorci potječu iz iste šarže i načelno imaju jednak kemijski sastav. Istraživanje je pokazalo da zaštita korijenske strane zavara argonom povećava penetraciju u odnosu na zaštitu helijem. Povećanje protoka argona na korijenskoj strani zavara rezultiralo je smanjenjem penetracije dok je u slučaju helija utvrđeno upravo suprotno. Stanje površine osnovnog metala nije značajnije utjecalo na dimenzije zone taljenja. Najveća penetracija ostvarena je za električni luk duljine 6 mm. Električni luk duljine 1,5 mm rezultirao je većom penetracijom u odnosu na luk duljine 3 mm. Povećanje vršnog kuta volframove elektrode s 20 ° na 45 ° nije bitnije utjecalo na penetraciju za luk duljine 1,5 mm i 3 mm. Međutim, za vršni kut elektrode od 20 ° zabilježena je veća penetracija ukoliko je duljina električnog luka iznosila 6 mm. Impulsno TIG zavarivanje rezultiralo je većom penetracijom u odnosu na konvencionalni TIG proces jednake efektivne jakosti struje, bez obzira na duljinu električnog luka i vrijeme zavarivanja. Niti jedan od istraženih faktora nije utjecao na promjenu širine zone taljenja.
Abstract (english)
In this PhD thesis, the influence of the stationary autogenous TIG welding process on the penetration profile for 316L austenitic stainless steel was investigated. It should be pointed out that by repeating the experiments under the same welding parameters, significant variations in the penetration depth were determined, despite the fact that the samples come from the same batch and have the same nominal chemical composition. The study has shown that weld root side argon purging increases penetration compared to helium purging. Increasing the argon flow on the weld root side decreased penetration, while the opposite was found in the case of helium. The surface condition of the base metal did not affect the dimensions of the fusion zones significantly. The highest penetration was achieved for 6 mm electric arc length. 1,5 mm arc resulted in greater penetration compared to 3 mm arc. Increasing the tungsten electrode vertex angle from 20 ° to 45 ° did not affect the penetration for 1,5 and 3 mm arc. However, 20 ° tungsten angle resulted in greater penetration in the case of 6 mm arc. Pulsed TIG welding increased penetration depth compared to the conventional TIG process of equal effective current, regardless of the arc length and the welding time. None of the investigated factors affected fusion zone width
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:179:477338
Promotion2023
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti, područje tehničkih znanosti, polje strojarstvo (doktor/doktorica znanosti, područje tehničkih znanosti, polje strojarstvo)
Type of resourceText
Extent163 str.
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
RepositoryRepository of the Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
Created on2023-03-09 14:12:39

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