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Title: | Microstructural studies in low specific energy laser surface treated Al(A356)-SiCp composites |
Authors: | Bhat, K.U. Surappa, M.K. |
Issue Date: | 2004 |
Citation: | Journal of Materials Science, 2004, Vol.39, 8, pp.2795-2799 |
Abstract: | SiC particulate reinforced A356 Al metal matrix composites were laser treated using pulsed Nd-YAG laser beam. The processing was carried out in air atmosphere at varying pulse energy (5 to 20 J) and scan rates (30 to 150 mm/sec). The samples were cut perpendicular to the track and they were characterized using optical microscopy, scanning electron microscopy and X-ray diffraction. Microstructure of laser treated region consists of regular succession of coarse and fine microstructure signifying the presence of low velocity bands. Transition from cellular/columnar dendritic to equiaxed dendritic structure has been observed. Microstructure of samples laser treated with specific energy greater than 13 kJ/cm2 show presence of Al 4C3 platelets. 2004 Kluwer Academic Publishers. |
URI: | http://idr.nitk.ac.in/jspui/handle/123456789/12496 |
Appears in Collections: | 1. Journal Articles |
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