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알루미늄 합금(Al6005)의 마찰교반용접(FSW)과 모재의 기계적 특성 비교 연구
구기영(Gi-Yong Gu) 산업기술교육훈련학회 2010 산업기술연구논문지 (JITR) Vol.15 No.2
In aluminium based composites, many difficulties are associated with the traditional welding problems of the matrix alloy, such as high thermal expansion and conductivity, high solubility of gases in the molten state, solidification shrinkages and presence of oxide inclusions. Friction stir welding results in low distortion and high joint strength compared with other welding procedures, and is able to join all aluminium alloys that are considered as virtually not weldable with classical liquid state techniques. The comparative study on high cycle mechanical properties between Al6005-T6 friction stir welds and base metal have been performed and fracture mechanisms for the fatigue specimens were investigated. Although the lower mechanical properties than the corresponding base material, the FSW joints of Al6005-T6 achieved higher tensile and fatigue strength compared to the traditional fusion weld.
철도차량 설계를 위한 A16005 알루미늄 판재의 마찰교반용접(FSW)과 MIG 용접부의 피로 특성 비교 연구
최원두,고준빈,구기영,Choi, Won-Doo,Ko, Jun-Bin,Gu, Gi-Yong 한국생산제조학회 2010 한국생산제조학회지 Vol.25 No.5
Friction stir welding results in low distortion and high joint strength compared with other welding procedures, and is able to join all aluminium alloys that are not considered as virtually weldable with classical liquid state techniques. The comparative study on high cycle fatigue properties between A16005-T6 friction stir welds and MIG weld joints have been performed and fracture mechanisms for the fatigue specimens were investigated. Although mechanical properties are lower than the corresponding base material, FSW joints of A16005-T6 become higher at tensile and fatigue strength in comparison with the traditional fusion weld(MIG). The fracture surfaces of FSW and MIG fatigue specimens cleary show different aspects of the fracture morphology. MIG weldments were characterized by voids and cleavage(brittle fracture) but FSW specimens showed the presence of ductile fracture surface.