Abstract. This study investigates Al 2 O 3 /SiCp-Al composites fabricated by pressure assisted liquidmetal infiltration techniques and modified alumina/SiC particle preforms. The infiltration has been done successfully; Examinations for microstructure, mechanical and physical properties of the composites have been fulfilled. Test results showed that the particle size was the most influential factor in decreasing mechanical properties of hybrid Al 2 O 3 /SiCp composite.
In this study, the effect of double pulsed Metal Inter Gas (MIG) -Gas Tungsten Arc Welding (TIG) on metal droplet transfer, weld pool profile, weld bead geometry and mechanical properties of weld joint of Al alloys are presented. Plates of AA5754-AA3003 aluminum alloys were dissimilar welded by ER5356 welding wire. Full penetration joints without any defects were produced. The influences of arc welding parameters on welding speed and weld appearance were studied through macrostructure and microstructure characterization of fusion zone of an AA5754-AA3003 weld joint. The tensile properties and micro-hardness values of welded specimens were measured.
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