Proven technology of Laser Shock Peening (LSP) process for the cavitation erosion resistance improvement

0538617 - FZÚ 2021 RIV CZ eng Z - Pilot plant, v. technol., variety, breed
Zulic, Sanin - Brajer, Jan - Kaufman, Jan - Böhm, M.
Proven technology of Laser Shock Peening (LSP) process for the cavitation erosion resistance improvement.
Internal code: OTSZ01/FZU/2020 ; 2020
Technical parameters: Aplikace technologie Laser shock peening na materiál vystavený kavitační erozi může výrazně prodloužit životnost zpracované součásti. Bylo experimentáně změřeno, že vyvolaná povrchová tlaková zbytková
Economic parameters: Výsledky projektu budou využity pro další projekty a aplikace zaměřené na zvýšení korozní odolnosti. Tyto aplikace by měly generovat komerční příjem v závislosti na počtu aplikací a průmyslových partnerů.
R&D Projects: GA TA ČR TN01000038
Institutional support: RVO:68378271
Keywords : laser shock peening * kavitace, pumpa
OECD category: Mechanical engineering

Development of the Laser Shock Peening (LSP) process which when applied can improve the resistance to the cavitation erosion in pumps. The basic principle of the LSP technology The high-energy laser after passing the confining medium is forming a high-pressure plasma. By this principle, shock waves are generated and they are plastically deforming the material and inducing deep compressed residual stresses. In such a principle, certain mechanical properties of the material are changed and typical improvements are prolonged fatigue life, prevention of the corrosion stress cracking, or wear resistance improvement. Additionally, the hardness can be improved as well. Cavitation erosion is a fatigue driven phenomenon, and by applying the LSP the cavitation erosion can be reduced and slowed down. The LSP was applied to the blades which in the end form the pump impeller. The blades are made of stainless steel 304 (1.4306) and stainless steel 321 (1.4541).
Permanent Link: http://hdl.handle.net/11104/0316959