Author(s)

J.Th.M. De Hosson & J. Noordhuis

Abstract

Surface modification by means of laser melting combined with shot peening: a novel approach J.Th.M. De Hosson, J. Noordhuis Research Group Materials Science, Department of Applied Physics, Materials Science Center, University of Groningen, Nijenborgh 4) 9747 AG Groningen, The Netherlands ABSTRACT An Al-Cu-Mg alloy, Al 2024-T3, was exposed to laser treatments at various scan velocities. In this paper the microstructural features and mechanical properties are reported. As far as the mechanical property is concerned a striking observation is a minimum in the hardness value at a laser scan velocity of 1/2 cm/s. Usually an increasing hardness with increasing laser scan velocities is reported in the literature. This remarkable property could be explained based on the microstructural features observed by transmission electron microscopy. INTRODUCTION In this work the microstructural features and mechanical behaviour of a laser treated Al-Cu-Mg alloy were investi

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