Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Analysis of plasma thermal surface effects on the residual stress field induced by LSP in Al2024-T351
Year:2009
Research Areas
  • Mechanical engineering,
  • Construction materials
Information
Abstract
In Laser Shock Processing, the shock wave induces plastic deformation and a residual stress distribution in the target material (if its peak pressure is greater than the dynamic yield limit). The material is also heated by the thermal flux generated upon laser material interaction and by the plastic deformation work. This produces a deleterious effect due thermal stress relaxation and tensile stresses generation in a narrow layer under the target free surface, what is of a critical importance from the point of view of the mechanical behaviour of the treated target. On the basis of the results provided by the calculational model developed by the authors, a number of process scaling laws have been obtained allowing the predictive assessment of the thermal/mechanical effects induced in LSP treated components, namely resulting residual stress fields and thermal cycles, as a function of key process parameters as laser intensity, interaction zone dimension, nature and thickness of confining medium, overlapping pulse density, etc., thus enabling the practical implementation of LSP technology as a profitable method for the enhancement of surface mechanical properties of metallic materials. In the present paper, the simulation of the phenomenology arising from plasma expansion between the confinement layer and the base material is specifically addressed as a clear factor influencing the subsequent thermo-mechanical behaviour of the treated specimens.
International
Si
Congress
E-MRS 2009 Spring Meeting
960
Place
Estrasburgo, Francia
Reviewers
Si
ISBN/ISSN
1546-198X
Start Date
08/06/2009
End Date
12/06/2009
From page
1
To page
1
The proceedings will be published as Sensor Letters, Special Issue (American Scientific Publisher).
Participants
  • Autor: Miguel Morales Furio (UPM)
  • Autor: Juan Antonio Porro Gonzalez (UPM)
  • Autor: Carlos Luis Molpeceres Alvarez (UPM)
  • Autor: Miguel Holgado Bolaños (UPM)
  • Autor: Jose Luis Ocaña Moreno (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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