Purpose: This work aims to investigate the microstructure and mechanical properties
achieved by FSW of butt joints, namely of dissimilar sheets namely of 2014-T3 to 5059-H11
Al alloys by bonding the two materials perpendicular to their rolling directions.
Design/methodology/approach: AA 2014T3 and AA 5059H11 were two dissimilar
aluminium alloys friction stir welded. The joint has been examined in terms of hardness,
microstructure, and mechanical properties. The microstructure of the weld area was
characterized by using optical microscopy. Seven diverse regions of the microstructure in
the joint can be illustrious.
Findings: It has been noticed that a structure of fine grain is formed in the nugget region
as a consequence of recrystallization. The thermos mechanically affected and heat affected
zones of aluminium alloy 2014 are characterized by the lowest hardness values in spite
of there are a general hardness decrease through the weld zone compared to both base
metals. The ultimate tensile strength values of the dissimilar joint were found to be varying
between 54% to 66% those of the base metal.
Research limitations/implications: The t joining in FSW takes place with the base
materials remnant in the solid state, which gives a considerable possibility to produce joints
between the alleged difficult-to-weld heat treatable aluminium alloys.
Originality/value: The outcomes display that friction stir welding can be effectively
applied for the joining of dissimilar aluminium alloys.
Effect of Welding Speed on Microstructure and Mechanical Properties due to The Deposition of Reinforcements on Friction Stir Welded Dissimilar Aluminium Alloys
