Temperatures, pressures and stresses during laser shock processing

    Authors

    T. Thorslund; F. J. Kahlen;A. Kar

    Abbreviated Journal Title

    Opt. Lasers Eng.

    Keywords

    shock processing; temperatures; pressures; stresses; non-ablative; ablative; confined ablative; WAVES; Optics

    Abstract

    Mathematical models are developed to calculate the temperatures, pressures and stresses during laser shock processing for time-modulated (ramp-up, ramp-down and rectangular) laser pulses. Three different shock processing configurations are also considered: non-ablative exposure, ablative exposure and confined ablation with coating. The results for iron show that the plasma pressure reaches an average value of 9 GPa in direct ablation configuration and plays a dominant role for all three types of laser pulses. In the case of confined geometry, the plasma pressure reaches an average value of 20 GPa. All calculated pressures and stresses exceed the yield strength of the workpiece, indicating plastic deformation. It is also shown that pulses with short rise times yield higher plasma pressures. (C) 2002 Published by Elsevier Science Ltd.

    Journal Title

    Optics and Lasers in Engineering

    Volume

    39

    Issue/Number

    1

    Publication Date

    1-1-2003

    Document Type

    Article

    Language

    English

    First Page

    51

    Last Page

    71

    WOS Identifier

    WOS:000179274600005

    ISSN

    0143-8166

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