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首页> 外文期刊>Journal of Manufacturing Processes >Magnetic pulse welding of Al/Al and Al/Cu metal pairs: Consequences of the dissimilar combination on the interfacial behavior during the welding process
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Magnetic pulse welding of Al/Al and Al/Cu metal pairs: Consequences of the dissimilar combination on the interfacial behavior during the welding process

机译：Al / Al和Al / Cu金属对的电磁脉冲焊接：焊接过程中异种组合对界面行为的影响

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摘要

This paper presents a comparison between Al/Al and Al/Cu magnetic pulse welded pairs, which highlights the influence of the dissimilar metal combination on the welded interface with respect to the variation in the initial radial air gap between a flyer and a target part. The welding of the Al/Al pair offers good bonding for a gap between 1 mm and 4 mm with a constant input voltage of 7.5 kV. The Al/Al interfaces show a metal continuity that can either be straight or wavy, and become progressively sheared by the welded parts with the increase in initial gap, so that the nearby grains of the interface evolve from an undeformed equiaxed to a flattened and elongated morphology. The welded joint deteriorated by a formation of fracture and voids which occurs as a result of strong interfacial shearing for large initial air gaps, which also leads to an ejection of fragments. In the welding of an Al/Cu combination, the nature of the interface changes. A formation of intermediate phases in the form of layers or pockets which constitute of a third compound becomes obvious at the Al/Cu interfaces, which may trigger various detrimental phenomena of the joints. Depending on the thickness of the intermediate phase, the interface becomes sensitive to several mode of failures such as formation of radial microcracks, fragmentation, axial propagation of macrocracks in tensile opening mode, fracture due to an interfacial ejection or interfacial separation due to a melting of the intermediate phase. These defects degrade the joint which initiate the formation of cracks at the interface for low initial air gap (g= 1 mm), even with a thin intermediate phase of few micrometers. The interface becomes completely damaged for an initial air gap of beyond 3 mm.
机译：本文介绍了Al / Al和Al / Cu磁脉冲焊接对之间的比较，强调了异种金属组合对焊接界面的影响，这与飞轮和目标部件之间的初始径向气隙变化有关。 Al / Al对的焊接在7.5 kV的恒定输入电压下提供了1 mm至4 mm间隙的良好粘结。 Al / Al界面显示出金属连续性，该连续性可以是直的或波浪形的，并随着初始间隙的增加而逐渐被焊接零件剪切，从而使界面附近的晶粒从未变形的等轴转变为扁平且细长的形态学。对于较大的初始气隙，由于强烈的界面剪切而导致断裂和空隙的形成，从而使焊接接头变差，这也导致碎片的弹出。在铝/铜组合的焊接中，界面的性质会发生变化。在Al / Cu界面上，由第三种化合物组成的层或袋状中间相的形成变得很明显，这可能会引起接头的各种有害现象。取决于中间相的厚度，界面对几种失效模式敏感，例如径向微裂纹的形成，破裂，在开孔模式下宏观裂纹的轴向传播，由于界面喷射引起的断裂或由于熔化而引起的界面分离。中间阶段。这些缺陷会降低接头的质量，即使在中间层只有几微米的情况下，也能在较低的初始气隙（g = 1 mm）时在界面处引发裂纹。初始气隙超过3毫米时，接口将完全损坏。

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  • 来源
    《Journal of Manufacturing Processes》 |2015年第1期|112-127|共16页
  • 作者

    R.N. Raoelison; T. Sapanathan; N. Buiron; M. Rachik;

  • 作者单位

    Laboratoire Roberval, UMR-CNRS 7337, Universite de Technologie de Compiegne, 60205 Compiegne, France,LERMPS, Universite de Technologie de Belfort Montbeliard-UBFC, 90100 Belfort, France,IRTES LERMPS UBCF-UTBM, Rue du Chateau, 90100 Belfort, Franche-comte, France;

    Laboratoire Roberval, UMR-CNRS 7337, Universite de Technologie de Compiegne, 60205 Compiegne, France;

    Laboratoire Roberval, UMR-CNRS 7337, Universite de Technologie de Compiegne, 60205 Compiegne, France;

    Laboratoire Roberval, UMR-CNRS 7337, Universite de Technologie de Compiegne, 60205 Compiegne, France;

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  • 正文语种 eng
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  • 关键词

    Magnetic pulse welding; Interface; Intermediate phase; Fracture; Weldability;

    机译：电磁脉冲焊接;接口;中间阶段;断裂;焊接性;

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