Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 66, Issue 11-12, Pages 1513-1520Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2005.11.023
Keywords
particle-reinforced composites; friction/wear; scanning electron microscopy; welding/joining; friction stir welding
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The microstructures and wear property of friction stir welded AZ91 Mg alloy/SiC particle reinforced composite (AZ91/SiC/10p) were investigated. The initial microstructures of the AZ91/SiC/10p were composed of irregularly distributed P-phases (Al12Mg17) and agglomerated SiC particles, while the friction stir weld zone was characterized by the homogeneous distribution of SiC particles, the recrystallized grain structure and the dissolution of P-phase. Thank to the microstructural modification, an improvement in the hardness and wear property of the weld zone were observed as compared to those of the base metal. The hardness near the weld zone was a higher and more homogeneously distributed and the wear resistance within the weld zone, as evaluated by the specific wear loss, was superior, as compared with the base metal. (c) 2005 Elsevier Ltd. All rights reserved.
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