Effect of laser shock peening parameters on residual stresses and corrosion fatigue of AA5083

0554586 - FZÚ 2022 RIV CH eng J - Journal Article
Kaufman, Jan - Špirit, Z. - Vasudevan, V.K. - Steiner, M.A. - Mannava, S.R. - Brajer, Jan - Pína, L. - Mocek, Tomáš
Effect of laser shock peening parameters on residual stresses and corrosion fatigue of AA5083.
Metals. Roč. 11, č. 10 (2021), č. článku 1635. E-ISSN 2075-4701
R&D Projects: GA MŠMT EF15_006/0000674
EU Projects: European Commission(XE) 739573 - HiLASE CoE
Grant - others:OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institutional support: RVO:68378271
Keywords : LSP * LPwC * residual stress * corrosion fatigue * aluminium alloy * sensitization * intergranular corrosion
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.695, year: 2021
Method of publishing: Open access

Aluminium alloy 5083 was subjected to Laser Shock Peening both with (LSP) and without protective coating (LPwC) at multiple pulse densities. A second LPwC treatment was conducted fully submersed under water, in addition to the standard laminar water flow condition. The results show that compressive residual stresses were generated in all cases, although their character varied depending on the peening strategy and method of confinement. In all cases, higher pulse density lead to an increase in compressive stresses with a saturation point of −325 MPa at 1089 p/cm2 for the LPwC treatments. Corrosion fatigue testing of sensitized samples then showed 59% and 69% improvement in fatigue strength after the LSP and LPwC treatments, respectively.
Permanent Link: http://hdl.handle.net/11104/0329286