ABSTRACT Frictions stir welding is a relatively new solid state joining process. Over the past decade a lot of research has been done on optimization of FSW process parameters by analysing the microstructure and mechanical properties. Large studies were done on Friction stir welding process based on process variables, effect of different tool geometries on weld quality and effect on different materials. The main process parameters considered over past studies are tool pin profile, spindle speed and tool traverse speed, but in all past research work only the effect of any one process parameter is considered at a time. Only very few researches were undertaken by considering all the above process parameters simultaneously. In this study, three different tool pin were designed and the effect of these pin geometries on the mechanical property of the joint were investigated. The process parameters like tool profile, tool rotational speed and traverse speed were considered simultaneously. The combined effect of these process parameters are studied. The welded joints were analysed for tensile strength, elasticity and micro-hardness. Taguchi method of design of experiment is used to optimize the process parameters for maximum value of ultimate tensile strength and percentage elongation for the weld joint.
ABSTRACTFrictions stir welding is a relatively new solid state
joining process. Over the past decade a
lotofresearchhasbeendoneonoptimizationofFSWprocessparametersbyanalysingthemicrostructure
and mechanical properties. Large studies were done on Friction stir
weldingprocess based on process variables, effect of different tool
geometries on weld uality andeffect on different materials. !he
main process parameters considered over past studies aretool pin
profile, spindle speed and tool traverse speed, but in all past
research wor" only theeffect of any one process parameter is
considered at a time. Only very few researches
wereunderta"enbyconsideringall
theaboveprocessparameterssimultaneously.#nthisstudy,three different
tool pin were designed and the effect of these pin geometries on
themechanical property of the joint were investigated. !he process
parameters li"e tool profile,tool rotational speed and traverse
speed were considered simultaneously. !he combined effectof these
process parameters are studied.!he welded joints were analysed for
tensile strength,elasticity and micro$hardness. !aguchi method of
design of e%periment is used to optimizethe process parameters for
ma%imumvalue of ultimate tensile strengthandpercentageelongation
for the weld joint.
