Lasersko udarno utrjevanje magnezijeve zlitine AZ80

Klobučar, Jan (author), Žagar, Sebastjan (mentor), Šturm, Roman (comentor)

V zaključni nalogi je obravnavana uporaba laserskega udarnega utrjevanja (LSP) za izboljšanje lastnosti magnezijeve zlitine AZ80. V okviru raziskave sta bila izdelana in analizirana dva vzorca magnezijeve zlitine, obdelana z različnimi intenzitetami laserskega udarnega utrjevana brez zaščitne plasti (LSPwC). Pri analizi smo se osredotočili na naslednje lastnosti: hrapavost, zaostale napetosti, mikrotrdota, korozijska odpornost in mikrostruktura. Dobljene rezultate smo primerjal z osnovnim materialom. Ugotovili smo, da LSPwC ugodno vpliva na trdoto, inducira tlačne zaostale napetosti in izboljša korozijsko obstojnost. Močno pa se poveča hrapavost površne, ki lahko negativno vpliva predvsem na korozijsko obstojnost zlitine.

• Language: Slovenian
• Keywords: lasersko udarno utrjevanje, magnezijeve zlitine, hrapavost površine, mikrotrdota, zaostale napetosti, mikrostruktura, korozijska odpornost
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [J. Klobučar]
• Year: 2023
• Number of pages: XII, 41 str.
• PID: 20.500.12556/RUL-150632
• UDC: 620.179:669.721.5:621.9.048(043.2)
• COBISS.SI-ID: 171077635
• Publication date in RUL: 21.09.2023

Secondary language

• Language: English
• Title: Laser shock peening of AZ80 magnesium alloy

Abstract

In this thesis, the use of laser shock peening (LSP) to improve the properties of AZ80 magnesium alloy was investigated. As part of the research, two samples of the magnesium alloy were prepared and analyzed using different intensities of laser shock peening without coating (LSPwC). During the analysis we focused on the following properties: surface roughness, residual stresses, microhardness, corrosion resistance and microstructure. The results obtained were compared with those of the base material. We found that LSPwC has a favorable effect on hardness, induces compressive residual stresses and improves corrosion resistance. However, the surface roughness increases significantly, which may have a negative effect especially on the corrosion resistance of the alloy.

• Keywords: laser shock peening, magnesium alloy, surface roughness, microhardness, residual stresses, microstructure, corrosion resistance