Volume 2, issue 2 2014 337341 issn 2347 3258 international journal of advance research and innovation friction stir processing of aluminum alloys for. Viewpoint paper recrystallization mechanisms during friction stir welding processing of aluminum alloys t. Friction stir processing of aluminum alloys international journal of. Grain refinement of aluminum alloys by friction stir.
Friction stir welding fsw is a solidstate joining process that uses a nonconsumable tool to join two facing workpieces without melting the workpiece material. The almg10 aluminum alloy reinforced with sic particles was subjected to friction stir processing fsp. High strength accompanied by high ductility is possible with materials. In this completed project, we verified and validated the potential of fsp processing to locally strengthen cast components, and to enhance mechanical properties. Heat is generated by friction between the rotating tool and the workpiece material, which leads to a softened region near the fsw tool. Investigate the potential of friction stir processing to form a particlereinforced zone in standard al cast components, by mixing and creating strengthening.
This book covers the rapidly growing area of friction stir welding. This book covers all aspects of friction stir welding and processing, from fundamentals to design and applications. Friction stir processing of ssm356 aluminium alloy core. Therein it can be seen that fsp causes the microstructure of the nugget region to. Friction stir processing fsp has been developed based on the basic principles of friction stir welding fsw, a solidstate joining process originally developed for aluminum alloys. It also addresses the use of the technology for other types of materials processing, including superplastic forming, casting modification, and surface treatments. Friction stir welding ppt, pdf report for mechanical. A padmanabhan, on the role variables in the friction stir processing of cast aluminum a319 alloy. Article information, pdf download for investigation of the effect of friction stir processing. The fsp method is a variation of traditional friction stir welding fsw, but in this case, it can be used to locally modify the properties in a part. Pdf grain refinement of aluminum alloys by friction stir.
Friction stir welding fsw is a relatively new joining process that has been demonstrated in a variety of metals, such as steel, titanium, lead, copper, and aluminum. Friction stir welding of az31b magnesium alloy with 6061. Friction stir processing in aluminum alloys, specifically to. Many aluminum alloys with specific properties, like high strength, suffers from certain limitations in terms of cost and time of production, apart from the reduction in ductility. Friction stir processing in wrought and cast aluminum alloys. Friction stir processing fsp is a proven tool for enhancement of aluminum alloys, imparting a finegrained, homogeneous microstructure. Pdf friction stir processing of ssm356 aluminium alloy.
The fatigue life and crack behavior of several aluminum alloys fsw joints have been presented. S senthilkumar, v balasubramanian, s natarajan, mechanical property and microstructural changes during friction stir processing of cast aluminum 2285 alloy. Manish, rajesh, adarsh bhoria, shailesh kumar pandey. Mahoney asm international materials park, ohio 440730002. Friction stir welding of 2xxx aluminum alloys including alli. Friction stir processing and friction stir spot welding process variants. Friction stir welding and processing editors rajiv s. What is attractive about fsp is that it can be incorporated in the overall manufacturing cycle as a post processing step during the machining operation to provide localized modification and control of. The aim of this experiment was to improve the mechanical properties of ssm 356 aluminum alloys by friction stir processing, a solidstate technique for. Friction stir welding has seen significant growth in both technology implementation and scientific exploration. Friction stir processing of ssm356 aluminium alloy sciencedirect. Friction stir processing of aluminiumsilicon alloys.
Pdf friction stir processing of aluminum alloys for. Now these aerospace aluminum alloys can be easily welded by the means of friction stir welding process. Investigate the potential of fsp to form a particlereinforced zone in standard al cast components, by mixing and creating strengthening particles, and establish optimum processing. Friction stir processing fsp, developed based on the basic principles of friction stir welding fsw, a solidstate joining process originally developed for aluminum alloys, is an emerging metalworking technique that can provide localized modification and control of microstructures in nearsurface layers of processed metallic components.
Pdf the aim of this experiment was to improve the mechanical properties of ssm 356 aluminum alloys by friction stir processing, a solidstate. Recent advances in friction stir welding processing of aluminum alloys. Temperature and forces in friction stir processing fsp induced by. Abbreviation of friction stir welding is fsw and it was invented by wayne thomas at the welding institute. Invention of friction stir welding friction stir welding was firstly invented at the welding institute of uk in 1991, as a solidstate joining technique and was initially applied to aluminum alloys 2, 3. Grain refinement of aluminum alloys by friction stir processing. The composite was made by mechanical mixing and gravity casting. Nov 19, 2011 friction stir processing fsp is a novel process developed based on the principle of friction stir welding fsw that locally manipulates the microstructure by imparting a high level of energy in the solid state resulting in improved mechanical properties. The processing forces were measured during the process and the resulting microstructure was analyzed using tem. Invented and patented by the welding institute, a british research and technology organization, the process is applicable to. Manipulate the microstructure to refine or strengthen locally. Friction stir processing of aluminum cast alloys for high. The effects of processing on microstructure, hardness, tensile properties, and fatigue crack growth behaviour of the alloys were studied. Friction stir processing fsp is a surface modifying technique, which was developed, based on the basic principles of friction stir welding fsw, but fsp is used to modify the local microstructure and does not join metals togethera rotating tool.
The book has been prepared to serve as the first general reference on friction stir technology. Initial patent applications of it were in the united kingdom in the year of 1991. Aluminum and its alloys including aa2024 aluminum copper alloy are used extensively in aerospace and automotive industries because of their low density and high strength to weight ratio 1, alcu alloy is a highstrength alloy in which a heterogeneous microstructure is obtained by thermomechanical processing tmp to obtain optimal. Friction stir processing of aluminium alloy aa7075. Effect of friction stir processing fsp on microstructure.
Mechanical properties of friction stir welded 6061 aluminium. Figure 1 schematic of friction stir processing 26 2. Friction stir welding transforms the metals from a solid state into a plastic like state, and then mechanically stirs the materials together under pressure to form a welded joint. The process is especially advantageous for joining aluminum and has been exploited commercially around the world in several industries. The mass fraction of sic particles in the composite was about 10%. Additionally, fsp has emerged as an advanced tool to produce surface composites by embedding second phase particles into the matrix. Friction stir processing of ssm356 aluminium alloy. Friction stir processing fsp of various aluminium alloys including wrought 6061 and cast a356, 319, and a390 have been systematically investigated in this study. By using fsp the enhancement in the mechanical properties can be achieved. The fsp causes intense plastic deformation, material. Basic temper designations applicable to heattreatable al alloys are tabulated. The analysis was conducted through employing a multi objective. The effect of friction stir processing on the microstructure and tensile behavior of aluminum alloys thesis pdf available may 2018 with 497 reads how we measure reads. Friction stir processing fsp is a relatively new surface modification technique for alloys and composites.
Since friction stir welding does not melt the parentalloy, the residual stresses present from a liquid solidification are reduced. Microstructural evolution and mechanical properties. Friction stir welding and processing viii wiley online books. The authors describe the links between the thermomechanical aspects and the microstructural evolution and use of these for the development of the friction stir process as a broader metallurgical tool for microstructural modification and manufacturing.
Investigation of the effect of friction stir processing parameters on. The grain size in the fsp zone depended on the condition of the base metal. The effect of processing the pretensile surface of a heattreatable aluminum alloy plate is to locally anneal and refine the grains in the material. Friction stir processing of aluminum alloys by ning sun. Apr, 2015 friction stir processing though fsp is a relatively new pro cessing technology, it has been widely applied to modify the microstructure of aerospace aluminum alloys highly alloyed 2xxx and 7xxx series to ac complish highstrength, fatigue and fracture resistant aluminum material. Friction stir processing fsp is a method of changing the properties of a metal through intense, localized plastic deformation 7. The production of finegrained 1050 aluminum alloy was reported using friction stir processing fsp technique. Friction stir processing of 2xxx aluminum alloys including alli alloys is the latest edition in the friction stir welding and processing series and examines the application of friction stir welding to high strength 2xxx series alloys, exploring the past and current developments in the field. Friction stir process fsp was conducted in both air and water on aluminium alloy aa7075, with the latter environment providing the smallest grain size and a higher surface copper level. Pdf friction stir processing of aluminum alloys for defense. Recent advances in friction stir weldingprocessing of. The project, microstructure evolution during friction stir processing of aluminum cast alloys, has already been completed in the summer of 2009. Marine, aerospace, rail and automotive applications are discussed.
Influence of processing parameters on microstructure and mechanical properties pages. Of thesis friction stir processing of aluminum alloys friction stir processing fsp is one of the new and promising thermomechanical. Su department of mechanical and astronautical engineering, naval postgraduate school, monterey, ca 939435146, usa. The joining of dissimilar aa 2024 and aa6061 aluminum alloys of 3mm thickness was accomplished by using friction stir processing fsp involve a double pass of welding action,its a new. The parameters of friction stir processing, for ssm 356 aluminum alloys under casting temperature at 620ac and argon gas flowing through porous graphite for 5 second by the time at quenching, were studied at three different travel speeds. Friction stir processing fsp is one of the new and promising thermomechanical processing techniques that alters the microstructural and mechanical properties of the material in single pass to achieve maximum performance with low production cost in less time using a simple and inexpensive tool. Abstract friction stir processing is a nobel technique. The parameters of friction stir processing for ssm 356 aluminum alloys were studied at three different travelling speeds. In the present work, sheets of aluminum alloys were friction stir processed under various combinations of rotational and translational speeds.
65 40 1589 1154 878 1270 704 1641 1506 1440 369 1591 46 435 1552 36 1182 1188 700 231 1559 1381 706 1614 906 356 641 445 562 1270 726 120 603 1223 1460 1316 815 197 24 724 928 486