• Title/Summary/Keyword: 마찰용접부

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Experimental Investigation of Fatigue Crack Growth Behavior in Friction Stir Welded 7075-T651 Aluminum Alloy Joints under Constant Stress Intensity Factor Range Control Testing (For LT Orientation Specimen) (일정 응력확대계수범위 제어 시험하의 마찰교반용접된 7075-T651 알루미늄 합금 용접부의 피로균열전파 거동의 실험적 고찰 (LT 방향의 시험편에 대하여))

  • Jeong, Yeui Han;Kim, Seon Jin
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.37 no.6
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    • pp.775-782
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    • 2013

  • In this study, as a series of studies aimed at investigating the spatial randomness of fatigue crack growth for friction stir welded (FSWed) 7075-T651 aluminum alloy joints, the fatigue crack growth behavior of FSWed 7075-T651 aluminum alloy joints was investigated for LT orientation specimens. Fatigue crack growth tests were conducted under constant stress intensity factor range (SIFR) control for 5 specimens of the FSWed 7075-T651 aluminum alloy, including base metal (BM), heat affected zone (HAZ), and weld metal (WM) specimens. The mean fatigue crack growth rate of WM specimens was found to be the highest, whereas that of HAZ and WM specimens was the lowest. Furthermore, the variability of fatigue crack growth rate was found to be the highest in WM specimens and lowest in BM specimens.

  • https://doi.org/10.3795/KSME-A.2013.37.6.775 인용 PDF KSCI

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

Experimental Comparison of Weld Zone Properties for $2mm^{t}$ Aluminum Alloy Sheets Friction-Stir-Welded using Milling Machine. (마찰용접 된 박판재의 용접부 특성에 대한 실험 비교)

  • Han, Min-Su;Jang, Seok-Ki;Lee, Don-Chool
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.1747-1751
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    • 2003

  • The paper shows properties such as vickers hardness, yielding and ultimate stresses for the weld zone of the butt and the lap jointed specimens, and compare maximum loads, stress-strain curves, deformation appearance after guided bending test and fracture appearance for butt and lap jointed specimens. The research in this experiment also shows the weldability of the butt joint specimen is better than that of the lap joint specimen using FSW with $2mm^{t}$ aluminum alloy sheet in milling machine.

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