Journal of Science and Technology of Composites

Fabrication of A5083/SiC surface composite by friction stir processing and its characterization

Document Type : Research Paper

Authors

1 Department of Material Engineering, Bu Ali Sina University, Hamedan, Iran

2 Department of Metallurgy and Materials Engineering, Hamedan University of Technology, Hamedan, Iran.

3 Department of Mechanical Engineering, Bu Ali Sina University, Hamedan, Iran

Abstract

Friction stir processing (FSP) is a novel process for refinement of microstructure, improvement of material’s mechanical properties and production of surface layer composites. In this investigation via friction stir processing, metal matrix composite (MMC) was fabricated on surface of 5083 aluminum sheets by means of 5 μm SiC particles. First combination of rotational speed and travelling speeds were performed. Optimum condition was selected due to highest tensile strength. It was seen that sample which fabricated by 1000rpm and 28mm/min had improvement in tensile strength in comparison to other conditions. After that the effect of multipass on the optimum sample were investigated. The friction processed surface composite layer was analyzed through optical and scanning electron microscopical studies. Mechanical properties of the friction stir processed surface composites were evaluated through microhardness and universal tensile tests. The results were compared with the properties of the base metal. The surface composite layer resulted in that change of tool rotational direction between FSP four passes exhibited better properties in hardness, tensile behavior and wear resistance compared to the behavior of the base metal. The microhardness and tensile strength of the as-received alloy, and surface composite after that change of tool rotational direction between four passes specimens were about 85Hv and 285 MPa, 118Hv and 316 MPa, respectively.

Graphical Abstract

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Main Subjects

References
 
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Journal of Science and Technology of Composites
Volume 2, Issue 4 - Serial Number 4
March 2016
Pages 31-36
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