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Descripción
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| Laser shock processing (LSP) is a technique for strengthening metals. This process induces a compressive residual stress field which increases fatigue crack initiation life, reduces fatigue crack growth rate and increases wear resistance of metals. We present a configuration and results in the LSP concept for metal surfaces treatments in underwater layer with constant thickness using laser irradiation at 1064 nm. A convergent lens is used to deliver 2, 5 J/cm^ in a 8 ns laser FWHM pulse produced by a Q-switch Nd:YAG Laser. Experimental results using a pulse density of 5 000 pulses/cm^ and spots of 0, 8 mm to 1, 5 mm in diameter on AISI 1040 steel surfaces, Ti6A14V surfaces, 304 Stainless Steel surface and 6061-T6 Aluminum surfaces are presented. A compressive residual stress distribution as a function of depth is assessed by the hole drilling method. High level compressive residual stresses are produced using a 1064 nm wavelength. This method can be applied for surface treatment of final metal products. | |
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Internacional
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Si |
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DOI
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Edición del Libro
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0 |
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Editorial del Libro
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ISBN
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978-0-7354-0511-0 |
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Serie
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Título del Libro
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PROCEEDING OF THE RIAO/OPTILAS 2007 |
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Desde página
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1123 |
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Hasta página
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1128 |