Lastnosti oblikovno obločno navarjene aluminijeve zlitine AlSi5

Lavrič, Anže (author), Klobčar, Damjan (mentor)

Oblikovno obločno navarjanje omogoča izdelavo kompleksnih izdelkov iz kovine. Pri izdelavi tankostenskih izdelkov z dodajnimi tehnologijami je izkoristek materiala občutno večji kot pri konvencionalnih procesih. Pri oblikovnem obločnem navarjanju lahko dobimo anizotropne lastnosti materiala. V nalogi smo se osredotočili na analizo tankih in debelih sten. Stene smo vizualno pregledali in izvedli rentgenski preizkus. Iz sten smo naredili vzorce za analizo natezne trdnosti, žilavosti ter vzorce za analizo mikrostrukture. Prelome epruvet za žilavost smo pregledali na digitalnem mikroskopu. Pri izdelavi enostavnih valjastih oblik smo analizirali proces oblikovnega obločnega navarjanja in optimirali tehnološke parametre. S temi parametri smo izdelali serijo bolj kompleksnih izdelkov brez prekinitve procesa. Ugotovili smo anizotropne mehanske lastnosti materialov, ki so bile odvisne od orientacije oz. smeri gradnje in prostora izreza epruvet na steni. V drugem delu naloge smo določili varilne parametre za kontinuirno varjenje kompleksnejšega izdelka s previsom. Z izbiro pravih varilnih parametrov je bilo mogoče odpraviti valovitost. Pri gradnji stene s previsom smo določili mejni kot, pri katerem je posedanje navarjenega sloja obvladljivo.

• Language: Slovenian
• Keywords: varjenje, AlSi5, varjenje MIG, robotsko navarjanje, žilavost navarjenega materiala, trdnost navarjenega materiala
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [A. Lavrič]
• Year: 2021
• Number of pages: XXII, 58 str.
• PID: 20.500.12556/RUL-124540
• UDC: 621.791.75:669.715(043.2)
• COBISS.SI-ID: 51336707
• Publication date in RUL: 30.01.2021

LAVRIČ, Anže, 2021, Lastnosti oblikovno obločno navarjene aluminijeve zlitine AlSi5 [online]. Master’s thesis. Ljubljana : A. Lavrič. [Accessed 3 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=124540

Secondary language

• Language: English
• Title: Properties of Wire Arc Additive Manufactured aluminium alloy AlSi5

Abstract

WAAM as additive technology enables manufacturing of complex products made of metals. Raw materials efficiency is significantly higher compared to conventional processes when manufacturing thin-walled products. When using WAAM anisotropic material properties can be obtained in the product. In the thesis we have focused on production and analysis of thin and thick walls. The produced walls were visually inspected and X-ray examined. From walls we made samples to analyze tensile strength, toughness and samples for microstructure analysis. Fractured samples for toughness were examined on a digital microscope. For manufacturing simple cylindrical forms, we analyzed WAAM process and optimized technological parameters. With these parameters, a series of more complex products without stopping the process was produced. We determined anisotropic mechanical properties, which depended on the orientation or direction of construction and the location of the samples cut-out. In the second part of thesis, we determined welding parameters for continuous welding of products with complex shape and overhang. By choosing the right welding parameters, it was possible to eliminate layer waviness. When constructing a wall with an overhang, we determined the limiting angle at which WAAM is not manageable.

• Keywords: welding, AlSi5, MIG welding, robotic welding, toughness, tensile strength