0587559 - FZÚ 2025 RIV eng J - Journal Article
Stránský, Ondřej - Beránek, L. - Pathak, Sunil - Šmaus, Jan - Kopeček, Jaromír - Kaufman, Jan - Böhm, Marek - Brajer, Jan - Mocek, Tomáš - Holešovský, F.
Effects of sacrificial coating material in laser shock peening of L-PBF printed AlSi10Mg.
Virtual and Physical Prototyping. Roč. 19, č. 1 (2024), č. článku e2340656. ISSN 1745-2759. E-ISSN 1745-2767
R&D Projects: GA MŠMT(CZ) EH22_008/0004573
Institutional support: RVO:68378271
Keywords : laser shock peening * sacrificial coating * laser powder bed fusion * microstructure * porosity * residual stresses
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 10.6, year: 2022
Method of publishing: Open access

The objective of this work is to study the effects of different coating materials (black paint, thermoplastic elastomers, black vinyl tape and uncoated surfaces) in Laser Shock Peening (LSP) processing of laser powder bed fusion (L-PBF) printed thin AlSi10Mg tubes. The investigations were carried out with pre-identified optimal LSP parameters for the AlSi10Mg material. The study was performed using an analysis of surface residual stresses, where a maximum compressive stress of −85 MPa has been reached, while the depth of the compressive regime stays till 2 mm. The microstructural study reveals the multifold dislocation of the grains and formation of new sub-grains, thus changing the grain boundaries in all experiments due to lattice strain development by LSP. Microhardness has also shown alteration after LSP and accounted for a 5–15% increase in it after LSP. Surface properties, such as roughness and volumetric parameters, have also shown changes after LSP processing.
Permanent Link: https://hdl.handle.net/11104/0354710