Coating Effect on Increasing Mechanical Property of 6061-T651 Alloy by Laser Shock Processing

Abstract:

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Laser shock processing (LSP) employs high-energy laser pulses from a solid-state laser to create intense shock waves into a material, which can induce compressive residual stresses in the target surface and improve its mechanical property efficiency. Three different ablative, sacrificial coating were chosen to protect the 6061-T651 alloys from surface melting by laser pulse. This paper analyzes the effect of the paint and foil coatings on the shock wave propagation into the 6061-T651 alloys and the resulting change in mechanical properties. The depths of hardening by laser processing of 6061-T651 alloys up to 1 mm, and the surface hardness reach to 138HV. When the laser pulse energy density increase from 2.8 GW/cm2 to 3.6 GW/cm2, the surface hardness of the black paint, aluminum foil and silica acid black paint samples increase to 19, 27, 36 respectively.

Info:

Periodical:

Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.

Pages:

681-686

DOI:

10.4028/www.scientific.net/MSF.546-549.681

Citation:

Y. K. Zhang et al., "Coating Effect on Increasing Mechanical Property of 6061-T651 Alloy by Laser Shock Processing", Materials Science Forum, Vols. 546-549, pp. 681-686, 2007

Online since:

May 2007

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Price:

$35.00

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