• Title/Summary/Keyword: 마찰용접

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Experimental Behaviors of Weld Zone Property of the Butt and the Lap Jointed Specimen Friction-Stir-Welded with 2mmt 1050 Aluminum Alloy Sheet (마찰교반용접된 겹치기 및 맞대기 용접부 특성에 대한 실험)

  • Jeon Jeong-il;Jang Seok-Ki
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.30 no.2 s.245
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    • pp.187-193
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    • 2006

  • The butt and the lap welding by friction stir welding performs with $2mm^t$ 1050 aluminum alloy sheet. This paper shows behaviors of property such as vickers hardness, yielding and ultimate stresses, and macro structures for weld zone cross section of the butt and the lap jointed specimens. It is also carried out making comparison with maximum loads, stress-strain diagrams, and deformation after the guided bending test and fracture behaviors between the butt and the lap jointed specimens. It is found that the weldability of the butt jointed specimen is better than that of the lap jointed specimen.

  • https://doi.org/10.3795/KSME-A.2006.30.2.187 인용 PDF KSCI

Characteristics of Dissimilar Materials Al alloy(A6005)-Mg alloy(AZ61) Under Friction Stir Welding for Railway Vehicle (철도차량 적용을 위한 Al alloy(A6005)-Mg alloy(AZ61) 이종소재 마찰교반용접 특성 연구)

  • Lee, Woo-Geun;Kim, Jung-Seok;Sun, Seung-Ju;Lim, Jae-Yong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.8
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    • pp.706-713
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    • 2016

  • In this study, the welding characteristics of friction stir welding were investigated in accordance with the tool plunge position and cooling to the base materials for the joining of dissimilar materials (A6005-AZ61). Other different welding conditions, such as the tool rotation speed and welding speed, were fixed to 500rpm-30mm/min, respectively, and welding was then carried out by placing the Mg alloy (AZ61) on the advancing side and Al alloy(A6005) on the retreating side. Welding was conducted under six different conditions. To investigate the welding characteristic, tensile test and microstructure observations using an optical microscope were carried out. As the tensile test result, the maximum strength appeared under the condition in which the tool is moved 1 mm to the Mg alloy direction and cooling to the base materials. Under the same welding conditions, the strength with cooling was approximately two times higher than that without cooling. The tool was located in each direction of 1.7 mm from the weld line. Therefore, in the excessive off-set of tool position, the welding integrity was in an extremely poor condition due to the lack of stirring. This study was confirmed by the A6005-AZ61 dissimilar friction stir welding the welding speed and the tool rotation speed. In addition, the temperature control and tool plunge position are important welding parameters.

  • https://doi.org/10.5762/KAIS.2016.17.8.706 인용 PDF KSCI