Uday M. B., Ahmad Fauzi M. N., Zuhailawati H., Ismail A. B.
Conference Paper · January 2013
DOI: 10.13140/2.1.1607.4568
Conference: The 1st International conference on Materials Engineering and The 3rd AUN/SEED-Net Regional Conference on Materials 2010
Abstract
Friction welding is a welding process developed with the aim to provide bonding of materials, which, due to different properties and microstructures, could not be bonded using traditional fusion processes. In many branches of modern industry, be it power, aviation, space, electronics, automotive or chemical, it is necessary to create joints combining advanced ceramics and metal alloys, of very complex shapes. In this study, a ceramic composite of Al2O3 – YSZ was friction welded to 6061 Al alloy. Alumina rods containing 0, 25 wt. % yttria stabilized zirconia were fabricated by slip casting in plaster of Paris molds and subsequently sintered at 1600°C. The diameters of the ceramic and metal rods were both 16 mm respectively. Rotational speeds for the friction welding were varied between 630 and 1250rpm. The friction pressure was maintained at 7 MPa for a friction time of 1min. Optical and scanning electron microscopy was used to analyze the microstructure of the products, particularly at the interface of the joints. The joining strength was determined through a four point bending and Vickers microhardness. The experimental results indicate that the mechanical strength of friction welded Al2O3 –25 wt% YSZ /6061 Al alloy components were obviously affected by joining in the low rotational speed.
