Effect of notch radius on mechanical properties and stop holes on fracture behaviour of friction stir processed 6061-t6 aluminium alloy
Loading...
Date
2022-10
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
G. B. Pant University of Agriculture and Technology, Pantnagar
Abstract
Aluminium alloy6061-T6 is a widely used material in aerospace, shipping, aviation, and automobile industries. In the present investigation, tensile test experiments were performed on friction stir processed Aluminium alloy 6061-T6 with different process parameters of transverse speeds 25, 50, and 75 mm/min and rotational speeds 700, 1050, and 1400 rpm and effect Notch root radius was studied by changing the notch root radius as 1.5, 2, 2.5 mm. The results obtained from the tensile tests were analysed in terms of Stress-Strain curves. The effect of change in Notch root radius was discussed. Mostly the specimen tested with notch root radius 1.5 mm sustained maximum Stress values with least strain. Mechanical properties have been observed with the base material having maximum strength and the friction stir processed material having relatively reduced strength. Fatigue life cycle experiment were also performed on the CT specimens having FSP with 25 mm/min transverse speed and rotational tool speed of 1400rpm respectively and effect of stop hole was discussed. The results obtained from the fatigue life cycle test were analysed intense of a-N curve. The fatigue life for the FSP CT specimen with 25mm/min transverse speed and rotational tool speed 1400 rpm without stop hole, with stop hole 4.5mm away from crack tip in centre line, with stop hole 4.5mm away from crack tip and 1.5mm offset and the base material specimen was found to be 20951, 33864, 38995 and 26865 cycles respectively. ANSYS comparative analysis has been done of fatigue life in SMART crack growth 2022 R2 version. Scanning Electron microscope (SEM) test was carried out to study fractured surface at different locations.