Authors: M Ghosh R K Gupta M M Husain
Publish Date: 2013/11/01
Volume: 45, Issue: 2, Pages: 854-863
Abstract
Joining of dissimilar materials is always a global challenge Sometimes it is unavoidable to execute multifarious activities by a single component In the present investigation 6061 aluminum alloy and 304 stainless steel were joined by friction stir welding FSW at different tool rotational rates Welded joints were characterized in optical and scanning electron microscopes Reaction products in the stirring zone SZ were confirmed through Xray diffraction Joint strength was evaluated by tensile testing It was found that the increment in average heat input and temperature at the weld nugget WN facilitated iron enrichment near the interface Enhancement in the concentration of iron shifted the nature of intermetallics from the Fe2Al5 to Ferich end of the FeAl binary phase diagram The peak microhardness and ultimate tensile strength were found to be maxima at the intermediate tool rotational rate where Fe3Al and FeAl2 appeared along with Fe2Al5The authors are indebted to the Director NML for his kind support during the study as well as for his permission to publish the work The authors are deeply appreciative of the financial support received from the Department of Science and Technology GoI NDelhi through sanction Letter No SR/S3ME/028/2007 dated 08/11/2007 which allowed us to carry out the experiments
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