Open AccessExperimental Investigation and Micro Structural Characteristics of GTAW and FSW Welded Dissimilar Aluminum Alloys
Author(s) -
Sairam Kotari,
Eshwaraiah Punna,
S. Madhava Reddy,
S. Venukumar
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/998/1/012036
Subject(s) - gas tungsten arc welding , materials science , welding , rotational speed , base metal , ultimate tensile strength , friction stir welding , metallurgy , composite material , aluminium , mechanical engineering , arc welding , engineering
Current paper shares the study on optimization of parameters for GTAW and FSW Aluminum alloys. Base metals chosen were AA6061 and AA7075, filler metal used for TIG welding is AA4043. Welding Current, Welding speed and gas flow rate were taken as input parameters for GTAW and axial load, weld speed and tool rotation were choosen as variables for FSW. L9 orthogonal array is used for design of experiments. Analysis of variance is used for ranking the parameters. It was found that an average tensile strength of 127MPa is found for GTAW samples and 151 MPa for FSW samples. Thus an overall 19% increase in strength is achieved. Micro structural analysis is done to investigate the reason for variation of strength. It was found that the formation of Mg-Si precipitates has affected the increase in strength for FSW samples.