접합시편의 고정위치에 따른 이종 알루미늄 합금의 마찰교반접합부특성

Joint characteristics of dissimilar formed Al alloys with fixed location of welded specimen by friction stir welding

The weld zone of dissimilar formed Al alloy exhibited the complex structure of the two materials and mainly composed of the retreating side material. The mechanical properties were also depended on the dominant microstructure of the weld zone with welding conditions. The different mechanical properties of weld zone with welding conditions were related to the behavior of the precipitates of wrought Al alloy and Si particles of cast Al alloy. The higher mechanical properties of weld were acquired when relatively harder material, wrought Al alloy, was fixed at the retreating side.