Friction stir welding for the solid-state welding process, superior to conventional gas tungsten arc welding and inert gas metal arc welding, 5086 aluminum alloy specimen used as the base material, 5xxx series has excellent high strength, corrosion resistance, can be used in aircraft, automobiles , 3C products ship the parts and components within the housing.
The experimental design their own stir welding machine to spindle speed 6000,7200,8400,9600 rpm, feed rate 30,60,300,600,1200 mm / min, shaft shoulder diameter 8mm, 5mm of thickness of 2mm, 1mm welding, and for weld crest spacing measurements, metallographic observation of microstructure, hardness measurements, to explore the different processing parameters, the changing nature of the specimen. Experimental results revealed that the spindle in the case of high-speed processing defects, the feed rate faster forward side of the weld in a row and there is no worm holes filled with produce, both sides of the petal pattern reduced, the feed rate in 300mm/min fill the surface of the weld was better than better than the other parameters. Measuring the results of the peak spacing, the faster feed rate with the greater distance between peaks, the smaller the distance between wave speed faster. Hardness of the specimen cross-section measurements that the low feed rate is more low-weld hardness of the nuclear area, with the feed rate increased the average hardness of weld nucleus increasing trend.