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Descripción
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| Following its first developments in the 1970¿s, and profiting by the increasing availability of laser sources delivering intensities above 109 W/cm2 with pulse energies in the range of several Joules and pulse widths in the range of nanoseconds, laser shock processing (LSP) is being consolidating as an effective technology for the improvement of surface mechanical and corrosion resistance properties of metals and is being developed as a practical process amenable to production engineering [1]. However, although significant work from the experimental side has been contributed by several authors to explore the optimum conditions of application of the treatments and to assess their ultimate capability to provide enhanced mechanical behaviour to work-pieces of typical materials [2], only limited attempts have been developed in the way of full comprehension and predictive assessment of the characteristic physical processes and material transformations. Provided the large amount of physical phenomena arising in the considered processes, namely the formation of a vapour/plasma phase, the generally far from equilibrium ionization-recombination processes in this plasma, the resulting electronic population dynamics leading to modified absorption properties, its thermofluiddynamic behaviour under extreme pressure and temperature conditions (typically leading to pressure/shock waves), etc., their proper development requires a deep understanding of the underlying physics and is absolutely needed for their reliable predictive assessment. In the present paper, a review on the physical issues dominating the development of LSP processes is presented along with the theoretical/computational and experimental diagnosis methods developed by the authors for their predictive assessment. In figure 1, a sample result showing the shock wave propagation in the plasma/target interface obtained by the used plasma simulation module and a sample sequence of the plasma expansion images registered by the experimental diagnosis system are shown. | |
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Internacional
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Si |
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Nombre congreso
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First International Conference on Laser Peening |
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Tipo de participación
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960 |
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Lugar del congreso
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Johnson Space Center NASA, Houston, Texas (EE.UU.) |
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Revisores
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Si |
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ISBN o ISSN
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0000000000 |
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DOI
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Fecha inicio congreso
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15/12/2008 |
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Fecha fin congreso
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17/12/2008 |
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Desde la página
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1 |
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Hasta la página
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1 |
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Título de las actas
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Presentaciones en la página web |