No abstract

AA2014 is an Al-Cu alloy friction stir welded under different combinations of rotational speed (800, 1000 and 1200 rpm) and transverse speed (44, 60, 72 mm/min) under minimum quantity lubrication condition with graphene nanofluid as coolant. Design of experiments is performed using Taguchi L9 orthogonal array. Analysis of variance technique is adapted to find the most influencing input parameter (rotational speed, transverse speed) of each output response (ultimate tensile strength, % elongation, microhardness and grain size). Regression and fuzzy logic based models are developed to predict the output responses. The reliability of the predicted results is tested by calculating the correlation coefficient. The predicted results from regression and fuzzy logic are then compared with the experimental results. The results of trend analysis exhibit the substantial influence of both the input parameters on the output responses. The results from ANOVA reveals that the rotational speed highly influences ultimate tensile strength and grain size while transverse speed majorly influences microhardness. The error in prediction using fuzzy model is observed to be significantly limited with correlation coefficients in the range of 0.70–0.96. The developed models are observed to be highly efficient and therefore can be used for prediction in any uncertain engineering applications.

No abstract

Friction stir welding is a solid state welding process that uses a rotating tool to amalgamate two metals by the frictional heat generated. Recent developments in FSW of aluminium have been exploited in aerospace, marine and transport industries. The friction stir welding on aluminium metal generates heat which has detrimental effects on the system in the long run. The heat generated, due to the friction developed, has to be reduced to provide a constant thermal environment for the tool and the workpiece. This work focuses on the conception to develop a water cooled tool holder to reduce the excess temperature thereby protecting the spindle bearing. The current paper elucidates on the design and parameters of water cooled tool holder and spring loaded seal, its implementation and the results obtained by friction stir welding of aluminum.

No abstract