Analysis on Weld Defect of Friction Stir Welding of Aluminum alloy Plate
2A12Al and 3A21Al alloy in 6mm thickness was friction stir welded using the process of weld.The reasons for forming defects,welding speed,rotating speed and pressure of the shoulder, were analyzed. The results show that the defect formations is related to the heat input and deficiency material flow in the welding process. Insufficient heat input or deficiency material softening will result in the joint defect in the process.
Due to economic growth, the number of cars has grown rapidly and consequently traffic accidents have grown in direct ratio. This reminds us that braking device of a vehicle is an important factor to prevent traffic accidents. Aim these researches to speed and lighten the braking system of vehicles, to lengthen its durability and to shorten the stopping distance. However, it is still difficult to analyze quantitatively and clearly the reason and solution for abnormal wear of disc and pad or judder in flywheel mode. Therefore this study was carried out to presume for mutual relation of analysis condition to get the optimum temperature by two-way layout. The results shown that coefficient of determination has a fine reliability over 92.57% and temperature is made by two-way layout.