Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Laser shock microforming of thin metal sheets
Year:2008
Research Areas
  • Mechanical engineering,
  • Naval engineering
Information
Abstract
Laser shock forming is a non-thermal laser forming method by using the shock wave induced by laser irradiation to modify the curvature of the target. It has the advantages of laser thermal forming (non-contact, tool-free and high efficiency and precision). But its non-thermal process makes it possible to maintain material properties or even improve them by inducing compressive stress over the target surface, which is desirable since it is important for shaped metal parts to resist cracks from corrosion and fatigue. In this paper, laser shock microforming is studied using both numerical and experimental methods for a thin metallic film. The numerical model is integrated by two principal modules, a 1-D radiation-hydrodynamics code that is used to simulate the dynamic evolution of laser created plasmas and a finite element code to study shock evolution and target deformation. The microforming experiments reported in this paper were performed on AISI 304 alloy using a Q switched Nd:YAG laser at 1064 nm wavelength with 9.4 ns FWHM and 54 mJ per pulse and 150 microns of spot radius. The sample curvatures were measured using confocal microscopy to find the bending angle. Analysis of the influence of laser spot position, number of pulses and thin sheet clamping is presented. The observed experimental profiles are in good agreement with the numerical model predictions. The suitability of laser shock microforming of thin metal sheets using ns pulsed lasers is demostrated.
International
Si
Congress
E-MRS SPRING MEETING 2008. SYMPOSIUM B
960
Place
ESTRASBURGO (FRANCIA)
Reviewers
Si
ISBN/ISSN
0000000000
Start Date
26/05/2008
End Date
30/05/2008
From page
1
To page
1
ABSTRACTS WEB EMRS
Participants
  • Autor: Jose Luis Ocaña Moreno (UPM)
  • Autor: Juan Antonio Porro Gonzalez (UPM)
  • Autor: Juan José García-Ballesteros . (UPM)
  • Autor: Oscar Garcia Garcia (UPM)
  • Autor: Miguel Morales Furio (UPM)
  • Autor: Carlos Luis Molpeceres Alvarez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería y Aplicaciones del Láser
  • Centro o Instituto I+D+i: Centro Laser
  • Departamento: Física Aplicada a la Ingeniería Industrial
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