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首页> 外文会议>International Conference on Global Trends in Joining, Cutting and Surfacing Technology >Comparison of Residual Stresses from Four Beads Produced with Different Arc Processes
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Comparison of Residual Stresses from Four Beads Produced with Different Arc Processes

机译：不同电弧工艺产生的四个珠子的残余应力的比较

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Due to environmental requirements of reducing the emissions of greenhouse gases, the use of aluminium alloys is expanding, particularly in the transportation industry. In order to extend the possibilities of aluminium assembly design, new Metal Inert Gas (MIG) welding processes have been conceived. They work at lower temperatures than usual arc processes (classic MIG, Tungsten Inert Gas) which limits deterioration of the parent metal by heat during the welding. This study compared four arc welding processes, with two innovative MIG processes, applied to the 6061 aluminium alloy. The 6061 aluminium alloy belongs to Al-Mg-Si alloys. It is strengthened by the Mg5Si6 precipitation which appears during natural or artificial ageing. This alloy is widely used in industry in particular for structural applications because of its good weight/strength ratio, its corrosion resistance and its ease of manufacturing (extruding, welding). Pulsed MIG, TIG, "double pulsed" MIG and MIG CMT processes have been used during the study. The MIG CMT is derived from pulsed MIG which works in the short-circuiting domain, i.e. at low energy. Its originality comes from wire motion which is associated to the current signal and eases the metal droplet deposition. These four weld processes have been compared through the analysis of the residual stresses. Residual stresses were determined with a non-destructive technique by using neutron diffraction carried out on the dedicated 2 axis G5.2 diffractometer at Laboratoire Leon Brillouin. The processes are classified according to the level and the distribution of the residual stresses in the domain close to the beads.
机译：由于减少温室气体排放的环境要求，铝合金的使用正在扩大，特别是在运输工业中。为了延长铝装配设计的可能性，已经构思了新的金属惰性气体（MIG）焊接工艺。它们在较低温度下工作而不是通常的电弧工艺（经典MIG，钨惰性气体），这限制了焊接期间通过热量的劣化劣化。本研究比较了四个电弧焊接工艺，具有两种创新的MIG工艺，适用于6061铝合金。 6061铝合金属于Al-Mg-Si合金。通过自然或人工老化期间出现的Mg5 Si 6沉淀加强。这种合金广泛用于工业中，特别是由于其良好的重量/强度比，其耐腐蚀性及其制造便利性（挤出，焊接）而在工业中。在研究期间已经使用脉冲MIG，TIG，“双脉冲”MIG和MIG CMT工艺。 MIG CMT衍生自脉冲MIG，其在短路域中工作，即在低能量下。其原创性来自与电流信号相关联的电线运动，并简化金属液滴沉积。通过分析残余应力，已经进行了这四种焊接过程。通过使用在Laboratoire Leon Brillouin的专用2轴G5.2衍射仪上进行的中子衍射来确定残留应力。根据靠近珠子的域中的残余应力的水平和分布进行分类。

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