Fabrication of Al/SiCp Composite and Nano-Composite with Functionally Graded Structure Via Friction Stir Processing

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Ziaei, Mohammad Reza | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 41373 (07)
University: Sharif University of Technology
Department: Materials Science and Engineering
Advisor(s): Kokabi, Amir Hossein; Bagheri, Reza
Abstract:
The feasibility to fabricate Al/SiCp nano-composite with functionally graded structure (FG-Al/SiCp) via friction stir processing was studied successfully in this paper. The distribution of well-dispersed nano-SiCp got a range of 6mm×3mm on the cross-section of nano-composite. A compositionally graded structure of nano-SiCp in thickness direction of the 5083Al plate was obtained via four passes of FSP. The percentage of nano-SiCp over 15%, 9% and 5% was found at the depth of 1.0mm, 2.0mm and 3.0mm, under processed surface of 5083Al rolled plate, respectively. Results show that the microhardness of FG-Al/SiCp nano-composite can reach steady 46%, 34% and 15% higher than the one of the base metal (about HV82) at the depth of 1.0, 2.0 and 3.0mm under processed surface, respectively
Keywords:
Composite ; Nanocomposite ; Friction Stir Welding ; Functionally Graded Materials (FGM) ; Scanning Electron Microscopy (SEM) ; Wear Properties

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