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Laser shock peening: toward the tse of pliable polid polymers for confinement

Type
Articles dans des revues avec comité de lecture
Author
LE BRAS, Corentin
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
RONDEPIERRE, Alexandre
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
SEDDIK, Raoudha
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
SCIUS-BERTRAND, Marine
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ROUCHAUSSE, Yann
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
VIDEAU, Laurent
119523 DAM Île-de-France [DAM/DIF]
FAYOLLE, Bruno
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
GERVAIS, Matthieu
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
MORIN, Leo
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
VALADON, Stéphane
254102 Airbus Operation S.A.S.
ECAULT, Romain
254102 Airbus Operation S.A.S.
FURFARI, Domenico
242528 Airbus Group [Germany]
BERTHE, Laurent
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/17950
DOI
10.3390/met9070793
Date
2019
Journal
Metals

Abstract

This paper presents the first extensive study of the performances of solid polymers used as confinement materials for laser shock applications such as laser shock peening (LSP) as opposed to the exclusively used water-confined regime up to now. The use of this new confinement approach allows the treatment of metal pieces needing fatigue behavior enhancement but located in areas which are sensitive to water. Accurate pressure determination in the polymer confinement regime was performed by coupling finite element simulation and experimental measurements of rear free-surface velocity using the velocity interferometer system for any reflector (VISAR). Pressure could reach 7.6 and 4.6 GPa for acrylate-based polymer and cross-linked polydimethylsiloxane (PDMS), respectively. At 7 and 4.7 GW/cm2, respectively, detrimental laser breakdown limited pressure for acrylate and PDMS. These results show that the pressures produced were also as high as in water confinement, attaining values allowing the treatment of all types of metals with LSP and laying the groundwork for future determination of the fatigue behavior exhibited by this type of treated materials.

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