Abstract
Aluminium alloys are commonly used in industries such as aerospace, automotive, shipbuilding and others because of their superior strength-to-weight ratio. Present work analyses the effects of different strain rates on the tensile strength and fracture behaviour of friction stir welded AA6061-T6 alloy. Butt welding of two plates of AA6061-T6 having dimensions 100 × 60 × 6 mm was done using friction stir welding (FSW). Welding had been done parallel to the direction in which plates were rolled and samples for tension test were extracted transverse to the rolling direction. Tension tests were performed under uniaxial static loading on a universal testing machine at room temperature. With increased strain rates, yield stress and ultimate strength also increased. At higher strain rates, more significant improvement in yield stress and ultimate strength was observed. Elongation of about 8% was found across all strain rates in the AA6061-T6 alloy welded using FSW.KeywordsStrain rateAluminium alloyFriction stir weldingTensile strength
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