Effects of sacrificial coating material in laser shock peening of L-PBF printed AlSi10Mg

• الحاوية / القاعدة: Virtual and Physical Prototyping
• المؤلفون الرئيسيون: Ondřej Stránský, Libor Beránek, Sunil Pathak, Jan Šmaus, Jaromír Kopeček, Jan Kaufman, Marek Böhm, Jan Brajer, Tomáš Mocek, František Holešovský
• التنسيق: مقال
• اللغة: الإنجليزية
• منشور في: Taylor & Francis Group 2024-12-01
• الموضوعات: Laser shock peening; sacrificial coating; laser powder bed fusion; microstructure; porosity; residual stresses
• الوصول للمادة أونلاين: https://www.tandfonline.com/doi/10.1080/17452759.2024.2340656

ABSTRACTThe 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.