Abstract
friction stir welds between 5754 aluminium alloy and
C11000 copper. The Friction stir welds of 5754 aluminium alloy and
C11000 copper were produced at different tool rotational speeds and
feed rates. The tool rotational speed was varied between 600 and
1200 rpm while the feed rate was varied between 50 and 300
mm/min. The visual inspection and the x-ray radiographic testing
techniques were employed to conduct the tests; these tests were
conducted on the welds to ascertain the joint integrity before
characterization to have an idea of the quality of the welds. No visual
defects were observed on all the welds considered but the x-ray
radiography technique revealed the presence of wormhole defects
and discontinuities in some of the welds. It was found that the welds
produced at 950 rpm with varied feed rates were the best quality
welds produced and this was substantiated with the microstructural
evaluation of the joint interface. It was found that these welds have
good mixing and metallurgical bonding at the interfaces.