The influence of laser beam on structure surface layer of composite A359/20SiCp
Damian Przestacki, Paweł Szymański
Quarterly No. 3, 2012 pages 155-158
DOI:
keywords: laser heating, metal matrix composite, microstructure of composite
abstract In terms of applications, aluminum alloys share a larger fraction of Al-SiC composites due to their high wear resistance and different specific mechanical properties. Because of the increasing requirements of these construction materials, different methods of machining, including laser assisted machining, have to be recognized. In many publications one can find that the machinability of metal matrix composites is dependent on the temperature of the process. This paper describes the influence of laser beams on metal matrix composites. In particular, experiments, measurements of the surface temperature and microstructure analyses of an aluminum alloy reinforced by silicon carbide (Al-SiC) heated by a laser beam were carried out. The influence of a laser beam on the microstructures of machined samples was investigated and some mechanisms of surface layer alteration were discussed. It was noticed that the laser beam impact on the workpiece induced the immersion of the reinforced particles into the soft matrix.