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Investigation on Friction stir Welding of Aluminium AA7075 alloy and Optimizing the Process parameters to Obtain Maximum Strength

Author(s):

D.Manikandan , Dhanalakshmi Srinivasan Engineering College, Perambalur

Keywords:

Friction Stir Welding, Microstructure, Tensile Property, Corrosion Resistance

Abstract

In this Work welding of Friction stir welding of aluminium alloy AA 7075 using an FSW machine was successfully completed. The Aluminium alloy is used in marine, Aerospace, Automobile applications. In FSW the downward or forging force was found to be dependent upon the shoulder diameter and rotational speed whereas the longitudinal or welding force on welding speed and pin diameter. The tensile strength of welds was significantly affected by welding speed and shoulder Diameter. The welding speed directly affects the percentage of elongation. The studies shows a fine grains Occurs in the weld nugget zone (WNZ) and Micro structural changes in the thermo mechanically affected zone (TMAZ) were found to be combined and influences of frictional heat and deformation. A maximum Joining efficiency was obtained for welds with good elongation. Microstructure studies shows a Coarsening and or dissolving of precipitates in nugget. Furthermore the Void defect is formed in the joint whereas the weld speed or rotational speed is quite high. In these Work different Parameters is taken for Friction stir welding as rotational speed, Welding speed and a constant Value is taken for Shoulder Diameter and Pin Diameter.

Other Details

Paper ID: IJSRDV8I70084
Published in: Volume : 8, Issue : 7
Publication Date: 01/10/2020
Page(s): 117-123

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