0571965 - FZÚ 2024 RIV GB eng J - Článek v odborném periodiku
Pathak, Sunil - Böhm, Marek - Kaufman, Jan - Kopeček, Jaromír - Zulic, Sanin - Stránský, Ondřej - Brajer, Jan - Beránek, L. - Mocek, Tomáš
Microstructure and surface quality of SLM printed miniature helical gear in LSPwC.
Surface Engineering. Roč. 39, č. 2 (2023), s. 229-237. ISSN 0267-0844. E-ISSN 1743-2944
GRANT EU: European Commission(XE) 739573 - HiLASE CoE
Výzkumná infrastruktura: CzechNanoLab II - 90251
Institucionální podpora: RVO:68378271
Klíčová slova: laser shock peening * residual stresses * meso size gear * helical gear * microstructure * grain refinement * dislocation * surface roughness
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 2.4, rok: 2023 ; AIS: 0.298, rok: 2023
Způsob publikování: Open access
DOI: https://doi.org/10.1080/02670844.2023.2207934

The present work describes the influence of underwater laser shock peening without coating on selective laser melting manufactured meso-size helical gears.Five experiments were conducted using energies in the 200mJ up to 1J,while the spot size and overlap were kept constant as 1mm and 90%,respectively.Responses were measured and compared in terms of surface residual stresses,surface roughness,and microstructure of LSPwC-treated samples.Results show the development of significant compressive residual stresses in the root of the LSPwC processed helical gear,where it changes the state from tensile +45MPa to compressive −421MPa.Surface roughness has shown improvement,while volumetric material peak confirms the reduction by over 50%.Microstructure study was performed at the surface and by cross-section using scanning electron microscopy and electron backscatter diffraction analysis.The grain refinement and change in misorientation were observed,confirming plastic deformation.
Trvalý link: https://hdl.handle.net/11104/0342821