Effect Of Tool Pin Profile On Microstructure And Mechanical Properties Of Al In Friction Stir Processing

Friction Stir Processing fsp Is ASolid State Process In Which ANon Consumable Stirring rotating Tool Is Plunged Into AWork Piece Up To Half Thickness, Which Causes Intense Plastic Deformation, Material Mixing, And Thermal Exposure, Resulting In Refinement Of Micro Structural Properties, Enhancement Of Mechanical Properties, And Homogeneity Of The Processed nugget ZoneThe Fsp Technique Has Been Successfully Used For Producing Finegrained Structure And Surface Composite, Modifying The Microstructure Of Materials, Synthesizing Composites Like Metalmetal CompositesThe Use Of Fsp Generates Significant Frictional Heating And Intense Plastic Deformation, Thereby Resulting In The Occurrence Of Dynamic Recrystallization In The Stirred Zone szAlthough There Is Still AControversy About The Grainrefinement Mechanism In The Sz, It Is Generally Believed That The Grain Refinement Is Due To Dynamic RecrystallizationTherefore, The Factors Influencing The Nucleation And Growth Of The Dynamic Recrystallization Will Determine The Resultant Grain Microstructure In The SzIt Has Been Demonstrated That The Fsp Parameters, Tool Geometry, Material Chemistry, Workpiece Temperature, Vertical Pressure, And Active Cooling Exert ASignificant Effect On The Size Of The Recrystallized Grains In The Sz.
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