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Development of Al3Ti and Al3Zr intermetallic particulate reinforced aluminum alloy AA6061 in situ composites using friction stir processing
Affiliation:1. Department of Mechanical Engineering, V V College of Engineering, Tisayanvilai 627 657, Tamil Nadu, India;2. Department of Mechanical Engineering, Coimbatore Institute of Technology, Coimbatore 641 014, Tamil Nadu, India;3. School of Mechanical Sciences, Karunya University, Coimbatore 641 114, Tamil Nadu, India;1. Osaka Research Institute of Industrial Science and Technology, 2-7-1 Ayumino, Izumi-City, Osaka 594-1157, Japan;2. Division of Materials and Manufacturing Science, Osaka University, 2-1 Yamadaoka, Suita-City, Osaka 565-0871, Japan;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. Institute for Materials Microstructure, Central South University, Changsha 410083, China;1. School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. School of Material Science and Engineering, Harbin Institute of Technology, Weihai 264209, China;3. Beijing Spacecrafts, Beijing 100094, China;1. Department of Mechanical Engineering, Anna University, Chennai 600025, Tamil Nadu, India;2. Department of Mechanical Engineering, Nehru Institute of Engineering and Technology, Coimbatore 641105, Tamil Nadu, India;3. Department of Mechanical Engineering Science, University of Johannesburg, Auckland Park Kingsway Campus, Johannesburg 2006, South Africa;4. Department of Mechanical Engineering, Coimbatore Institute of Technology, Coimbatore 641014, Tamil Nadu, India
Abstract:Aluminum rich intermetallic particles are potential reinforcements for discontinuously reinforced aluminum matrix composites (DRAMCs). The objective of the present work is to produce AA6061/Al3Ti and AA6061/Al3Zr composites using in situ casting technique and applying friction stir processing (FSP) to enhance the distribution and morphology of Al3Ti and Al3Zr particles. AA6061/Al3Ti and AA6061/Al3Zr DRAMCs were produced by the in situ reaction of inorganic salts K2TiF6 and K2ZrF6 with molten aluminum. The microstructure was observed using optical and scanning electron microscopy. AA6061/Al3Ti DRAMC exhibited clusters of Al3Ti particles while the segregation of needle shape Al3Zr particles was observed in AA6061/Al3Zr DRAMC. The prepared composites were subjected to FSP. Significant changes in the distribution and morphology of Al3Ti and Al3Zr particles were observed after FSP. The changes in microhardness and sliding wear behavior of AA6061/Al3Ti and AA6061/Al3Zr DRAMCs before and after FSP is detailed in this paper.
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