Vpliv vibracij na mikrostrukturno anizotropijo in mehanske lastnosti oblikovno navarjene aluminijeve zlitine

Avbelj, Nejc (author), Trdan, Uroš (mentor), Klobčar, Damjan (comentor)

Vedno večje je povpraševanje po lahkih materialih z dobrimi mehanskimi lastnostmi. Temu se ustrezno hitro razvijajo tudi izdelovalne tehnologije, s katerimi poskušamo doseči čim boljšo kvaliteto s čim nižjimi stroški izdelave. V porastu so aditivne tehnologije, ki nudijo številne poenostavitve pri izdelavi izdelkov s kompleksno geometrijo. Postopek oblikovnega obločnega navarjanja - WAAM ima kljub prednostim tudi določene slabosti. Težave se pojavijo pri kontroli ohlajanja taline, večji poroznosti in anizotropiji mikrostrukture, kar vodi v slabše mehanske lastnosti izdelka. Napreden način izdelave kovinskih izdelkov predstavlja CMT proces varjenja med katerim na izdelek sočasno prenašamo vibracije. Te učinkovito vplivajo na mehanizme formiranja mikrostrukture, pospešijo razplinjanje taline in zmanjšajo anizotropijo materiala. Posledi čno lahko dobimo var z bolj homogeno mikrostrukturo, 200 % manjšo poroznostjo in boljšimi mehanskimi lastnostmi.

• Language: Slovenian
• Keywords: aluminijeva zlitina - AlMg5, oblikovno obločno navarjanje - WAAM, hladen prenos kovine - CMT, vibracije, mikrostruktura, poroznost, zaostale napetosti, natezna trdnost
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2024
• Number of pages: XXIV, 79 str.
• PID: 20.500.12556/RUL-161661
• UDC: 621.791:621.9.04:539.412(043.2)
• COBISS.SI-ID: 219830787
• Publication date in RUL: 13.09.2024

AVBELJ, Nejc, 2024, Vpliv vibracij na mikrostrukturno anizotropijo in mehanske lastnosti oblikovno navarjene aluminijeve zlitine [online]. Master’s thesis. [Accessed 26 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=161661

Secondary language

• Language: English
• Title: Effect of vibrations on microstructural anisotropy and mechanical properties of wire arc additive manufactured aluminium alloy

Abstract

The demand for lightweight materials with good mechanical properties is increasing. Accordingly, manufacturing technologies are also rapidly developing, aiming to achieve the best possible quality at the lowest possible production costs. Additive technologies, which offer numerous simplifications in the production of complex geometric products, are on the rise. The WAAM process, despite its advantages, also has certain weaknesses. Issues include the control of melt cooling, higher porosity, anisotropy of the microstructure, and consequently poorer mechanical properties of the product. An advanced method of manufacturing metal products is represented by the CMT process, during which vibrations are simultaneously applied to the product. These effectively influence the mechanisms of microstructure formation, accelerate the degassing of the melt, and reduce material anisotropy. Consequently, we can obtain a weld with more homogeneous microstructure, 200 % less porosity, and better mechanical properties.

• Keywords: aluminium alloy - AlMg5, wire arc additiv manufacturing - WAAM, cold metal transfer - CMT, vibrations, microstructure, porosity, residual stress, tensile strength