Evaluation of friction stir lap welded aluminium alloy to HIF-GA steel sheet joint by modified digital x-ray radiography and ultrasonic B scanning
- Das H. ,
- Kumar A. ,
- Rajkumar K.V. ,
- et al
- Das H. ,
- Kumar A. ,
- Rajkumar K.V. ,
- Saravanan T. ,
- Jayakumar T. and
- Pal T.K.
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Description
Dissimilar joints between AA 6061 aluminium alloy (Al, 0.91%Mg, 0.52%Si, 0.6%Fe) sheets (thickness 2 mm) and zinc-coated HIF-GA (high strength interstitial-free galvannealed) steel (0.002%C, 0.09%Si, 0.47%Mn) sheets (thickness 1 mm) were fabricated by friction stir lap welding and flaws and defects were analysed by modified digital X-ray radiography and ultrasonic B-scan and C-scan imaging. Welding was performed using an RM series friction stir welder Model RM1A-0.7 at rotational speeds of 500-1500 rpm and travel speeds of 50 or 100 mm/min. Radiography was used to detect volumetric flaws such as excessive flash and cavities while ultrasonic inspection was employed to characterise planar flaws such as kissing bonds. The effect of different process parameter combinations on the probability of defect formation is discussed.
10th International Symposium, 20-22 May 2014, Session 11A: Dissimilar II, Paper 03
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