Investigation on friction stud welded AMC/AISI 304 steel joints with ceramic intercoating
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(2020) 42:538
TECHNICAL PAPER
Investigation on friction stud welded AMC/AISI 304 steel joints with ceramic intercoating R. Tharmaraj1 · N. Rajesh Jesudoss Hynes2 · P. Shenbaga Velu3 Received: 11 June 2019 / Accepted: 15 September 2020 © The Brazilian Society of Mechanical Sciences and Engineering 2020
Abstract Friction stud welding, a recent variant of friction welding process, is ideally suited for naval applications, short-term emergency repairs, submarine rescue, aerospace applications and automotive applications. In all these critical applications, there is a need for joining of dissimilar materials in general and aluminium matrix composites/steel joints in particular as in the case of recent aerospace and automotive applications. The strength of the dissimilar joint is a major concern in all these applications. Due to the variation in thermal properties and inhomogeneous temperature distribution, heat-affected zones are formed that lead to deterioration in strength in the dissimilar joints. In the present work, a new procedure is disclosed that can increase the strength of the dissimilar joint. The design of the specimen is modified and ceramic slurry is introduced at the interface in order to achieve increase in joint efficiency and higher joint strength. Keywords Friction stud welding · Dissimilar materials · Ceramic coating · Mechanical properties · Optical microscope
1 Introduction In general, aluminium alloys are used as a structural materials in different industries such as automotive, aerospace and railway applications. In particular, in the field of automobile engineering, there is a requirement of joining a mild steel earthing pin to an aluminium car body. These demands could be satisfied by a new generation of metal matrix composites, namely aluminium matrix composites. Recent engineering applications require stronger, lighter and less expensive materials. The development of these materials should have good mechanical properties such as strength-to-weight ratio for aerospace and automobile applications [1, 2]. Joining of similar and dissimilar materials could be achieved by a solid-state welding process known as friction stud welding. Technical Editor: Lincoln Cardoso Brandao, Ph.D. * N. Rajesh Jesudoss Hynes [email protected] 1
Department of Mechanical Engineering, National Institute of Technology, Warangal, Telangana 506004, India
2
Department of Mechanical Engineering, Mepco Schlenk Engineering College, Sivakasi, Tamil Nadu 626005, India
3
Department of Mechanical Engineering, PSR Engineering College, Sivakasi 626140, India
During ordinary arc welding process, there is a formation of intermetallic phases, which creates hindrance to the joining process. Hence, ordinary welding process cannot be used for joining of dissimilar materials. For the last two decades, friction welding process has more significance for joining of dissimilar materials [3]. Many researchers carried out joining of dissimilar materials using friction welding machine by varying the different process pa
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