Lasersko udarno utrjevanje oblikovno obločno navarjenih aluminijevih zlitin

Samec, Martin (author), Trdan, Uroš (mentor), Klobčar, Damjan (comentor)

V diplomski nalogi smo preučevali vpliv laserskega udarnega utrjevanja brez zaščitne prevleke (LSPwC) na aluminijeve zlitine, izdelane s tehnologijo oblikovnega obločnega navarjanja WAAM. Osredotočili smo se na analizo zaostalih napetosti in površinske topografije pri vzorcih, ki so bili obdelani z različnimi kombinacijami parametrov LSPwC (gostota moči in stopnja prekritja). Poleg tega smo preučevali tudi vpliv med-procesnih vibracij, ki smo jih uvedli med samim postopkom navarjanja, in analizirali njihov učinek na končno topografijo in napetostno stanje površinskega sloja materiala. Meritve zaostalih napetosti smo izvedli z uporabo rentgenske difrakcijske metode (XRD), topografijo površin pa smo ovrednotili s pomočjo digitalne mikroskopije. Rezultati so pokazali, da lahko z ustrezno kombinacijo obdelovalnih parametrov in uporabo vibracij med WAAM postopkom dosežemo bistveno izboljšano stanje zaostalih napetosti ter zmanjšamo valovitost na površini.

• Language: Slovenian
• Keywords: oblikovno obločno navarjanje - WAAM, lasersko udarno utrjevanje brez zaščitne prevleke - LSPwC, površinska topografija, zaostale napetosti, valovitost, med-procesne vibracije
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2025
• Number of pages: XII, 46 f.
• PID: 20.500.12556/RUL-172148
• UDC: 621.9.048.7:621.791.75:669.715(043.2)
• COBISS.SI-ID: 248399619
• Publication date in RUL: 06.09.2025

Secondary language

• Language: English
• Title: Laser shock peening of wire arc additively manufactured aluminium alloys

Abstract

In this thesis, we investigated the influence of laser shock peening without coating (LSPwC) on aluminum alloys manufactured using wire arc additive manufacturing (WAAM). The study focused on the analysis of residual stresses and surface topography in specimens treated with various combinations of LSPwC parameters (power density and overlap rate). Additionally, we examined the effect of inter-process vibrations introduced during the WAAM process and evaluated their impact on the final surface topography and residual stress state. Residual stresses were measured using X-ray diffraction (XRD), while surface topography was evaluated via digital microscopy. The results showed that an appropriate combination of LSPwC processing parameters and the application of inter-process vibrations during WAAM can significantly improve the residual stress state and reduce surface waviness.

• Keywords: wire arc additive manufacturing – WAAM, laser shock peening without coating – LSPwC, surface topography, residual stresses, waviness, inter-process vibrations