Abstract
The physical and mechanical aspects of laser shock processing (LSP) with plasma confinement were investigated with the aim of establishing the state of the art and assessing possible applications. Using a pulsed Nd :glass laser, fundamental processing aspects were studied, such as the precise role played by surface protective coatings and laser impact area on shock loading. For instance, it was shown that Al based coatings could enhance the peak stress values experienced by iron based surfaces by up to 50%. Residual stresses were investigated as the main contributor for improving surface behaviour. Lastly, the beneficial effects of LSP were demonstrated through two applications of the process: improvement offatigue behaviour and pitting corrosion resistance of steels.
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