Mechanical properties of friction welded 6063 aluminum alloy and austenitic stainless steel |
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Authors: | P Sammaiah Arjula Suresh G R N Tagore |
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Affiliation: | (1) Department of Mechanical Engineering, S R Engineering College, Warangal, 506371, Andhra Pradesh, India;(2) Department of Mechanical Engineering, National Institute of Technology, Warangal, 506004, Andhra Pradesh, India |
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Abstract: | Friction welding of dissimilar metal combination of aluminum alloy and austenitic stainless steel was examined to investigate
the effect of welding conditions on mechanical properties of the dissimilar metal combination. The welded joints were produced
by varying forge pressure (F
g), friction pressure (F
r), and burn-off length (B). The joints were subjected to mechanical testing methods such as the tension, notch Charpy impact tests. The tensile strength
and toughness decrease with an increase in friction pressure. The tensile strength decreases with an increase in burn-off
length at a low forge pressure while tensile strength increases with an increase in burn-off length at a high forge pressure.
The tensile failure of the welded joint occurred in aluminum alloy just away from interface in the thermo-mechanically affected
zone indicates good joint strength at the condition of low friction pressure, high forge pressure, and high burn-off length.
The maximum tensile strength was observed with low friction pressure and high forge pressure. The tensile strength of dissimilar
joint is approximately equal to tensile strength of 6063 aluminum alloys at the condition of low friction pressure, high forge
pressure, and high burn-off length. The tensile and impact failure of joints was examined under scanning electron microscope
and failure modes were discussed. |
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Keywords: | |
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