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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Gas-tungsten arc welding of AZ91 magnesium alloy
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Gas-tungsten arc welding of AZ91 magnesium alloy

机译：AZ91镁合金的钨极氩弧焊

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摘要

The gas-tungsten arc (GTA) welding behaviors of the commercial AZ91 magnesium alloy were examined in terms of process efficiencies and microstructure characteristics. This study focused on the effects of GTA welding process parameters (like welding current in the range of 100/300 A and welding speed in the range of 3.33/13.33 mm/s) on energy absorption by the substrate material. The dependences of arc and welding efficiency on the used process parameters were presented. The measurements revealed that the arc efficiency values ranged from 0.63 to 0.88. Melting efficiency was found to rise with both increasing welding current and speed. The analyses revealed a strong influence of the GTA welding process on the width and depth of the fusion zone and also on the refinement of the microstructure in the fusion zone. The results of dendrite arm size (DAS) measurements were presented. Additionally, the presence of a partially melted zone (PMZ) was disclosed.
机译：从工艺效率和微观结构特征方面研究了商用AZ91镁合金的钨极氩弧焊（GTA）焊接行为。这项研究集中于GTA焊接工艺参数（例如100/300 A范围内的焊接电流和3.33 / 13.33 mm / s范围内的焊接速度）对基体材料吸收能量的影响。提出了电弧和焊接效率对所用工艺参数的依赖性。测量表明，电弧效率值的范围为0.63至0.88。发现熔化效率随着焊接电流和速度的增加而提高。分析显示，GTA焊接工艺对熔合区的宽度和深度以及熔合区微结构的细化都有很大影响。给出了枝晶臂尺寸（DAS）的测量结果。另外，公开了部分熔融区（PMZ）的存在。

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