• Title/Summary/Keyword: Solid State Welding

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The characteristics of lapping Friction Stir Welded Al 5052 alloy (Al 5052 합금의 마찰교반 겹치기 접합 특성)

  • Ju, Su-Won;Park, Gyeong-Chae
    • Proceedings of the KWS Conference
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    • 2005.06a
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    • pp.226-228
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    • 2005
  • Of typical welding techniques, to employ the heat for joining process is the most commonly used welding process. But there arise difficulties when this process is applied to light weight alloys such as Aluminium alloy. In this respect, Friction Stir Welding(FSW), a solid-state joining process, is the most effective welding technique with significant potential for various industrial applications. In this study, the characteristics of lapping FSW Al 5052 alloy are shown under a variety of welding parameters such as the rotation speed of FSW tool and welding velocity. Conclusively, the welding properties of lapping FSW Al 5052 were found to be dominated by the deformation of non-joining area near the welding nugget rather than other factors such as the thermal input.

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Optimal Selection of the Welding Parameter for Base material of A16061 by Using MIG Welding Method (MIG용접을 이용한 A16061의 최적용접조건의 선정)

  • 최용기;정윤교
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 1999.05a
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    • pp.269-274
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    • 1999
  • Aluminum alloy has not only physical characteristic of very high activated high thermal conductivity and high thermal coefficient expansion but also special characteristic of great difference fusibility of hydrogen between liquid and solid phase. Because of these reasons, Aluminum welding is very different. Therefore, only MIG welding method should be applied instead of other welding methods. In this study, in order to select optimal welding conditions, it has been to investigate the effectiveness on the welding current, welding speed, flow rate of gas and welding voltage to occurrence of spatters, external shape of bead, state of penetration and width and hight of bead by using filer metal of A15356(dia. 1.21mm) on the base material of A16061.

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Review of magnetic pulse welding

  • Kang, Bong-Yong
    • Journal of Welding and Joining
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    • v.33 no.1
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    • pp.7-13
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    • 2015
  • Magnetic pulse welding(MPW) is a solid state welding process that is accomplished by a magnetic pulse causing a high-velocity impact on two materials, resulting in a true metallurgical bond. One of the great advantages of MPW is that it is suitable for joining dissimilar metals. No heat affected zones are created because of the negligible heating and the clean surfaces formation that is a consequence of the jet and the metal is not degraded. Also, compared to other general welding processes, this process leads to only a low formation of brittle intermetallic compounds However, although this process has many advantages its application to industrial fields has so far been very low. Therefore, in this study we are presenting the principles, apparatus and application of MPW for application the industrial fields.

3D Finite Element Analysis of Friction Stir Welding of Al6061 Plates (Al6061-T6 판재의 마찰교반용접 3D 유한요소 해석)

  • Goo, Byeong-Choon;Jung, Hyun-Seung
    • Journal of Welding and Joining
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    • v.29 no.4
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    • pp.73-79
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    • 2011
  • Friction stir welding (FSW) is a solid state joining method patented in 1991 by The Welding Institute (TWI). It is widely used for joining light metals such as Al and Mg alloys. Foreign railway vehicle manufacturing companies have been applying FSW to car body welding, but domestic companies are in the beginning of feasibility study. Therefore, lots of experimental and analytical study is needed. In this study, three-dimensional finite element modeling of the friction stir welding of two Al6061-T6 plates was carried out. And temperature field and residual stresses were obtained and compared to experimental results in the literature. It is found the analytic thermal field is in a good agreement with the experimental results, but there are some differences between numerical and experimental residual stresses.

Investigation of the Properties of Laser-Welded Amorphous Metal in a Deep Frozen Environment (극저온 환경하에서 레이저 용접된 비결정질 재료의 특성에 관한 연구)

  • 이건상
    • Journal of Welding and Joining
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    • v.15 no.3
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    • pp.99-108
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    • 1997
  • For the conventional welding method, the high heat transfer makes the crystallization of the work material unavoidable. Whereas the laser is able to weld the amorphous metal without a crystallized zone, because heat transfer is limited withn a very small restricted volume. In this paper, the possibilities and the limits of the laser welding in a deep frozen environment by liquid nitrogen were studied to utilize the advantageous properties of amorphous metal foils. The author investigated, after laser welding in a deep frozen environment with a solid state laser (Nd:YAG-laser), the achievable strengths and the influences of the laser beam parameters on the strengths.

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