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Refill friction stir spot welding of aerospace alloys in the presence of interfacial sealant
Welding in the World ( IF 2.1 ) Pub Date : 2021-03-29 , DOI: 10.1007/s40194-021-01113-3
Pedro de Sousa Santos , Anthony R. McAndrew , João Gandra , Xiang Zhang

Refill friction stir spot welding (refill FSSW) is one of the most industrially promising friction stir spot welding variants. The absence of an exit hole improves the effectiveness of surface treatments and minimizes damage by fouling. Aerospace aluminium alloys AA2024-T3 and AA7075-T6 with a thickness of 2 mm were used in this investigation. A range of values for rotation speed and plunge depth were experimented to determine the most promising process parameter combination based on the cross-sectional analysis and lap shear strength. The effect of an interfacial sealant on the weld properties was determined for both alloys using the most promising process parameter combination. Fatigue life analysis and fractography using scanning electron microscopy were performed for specimens with and without sealant.



中文翻译:

界面密封剂存在下的航空合金充填式搅拌摩擦点焊

补充搅拌摩擦点焊(refill FSSW)是工业上最有希望的摩擦搅拌点焊变型之一。没有出口孔可以提高表面处理的效率,并最大程度地减少积垢造成的损坏。在这项研究中,使用了厚度为2 mm的航空铝合金A2022-T3和A7075-T6。根据横截面分析和搭接剪切强度,对一系列转速和切入深度进行了实验,以确定最有前途的工艺参数组合。使用最有前途的工艺参数组合确定了两种合金的界面密封剂对焊接性能的影响。使用和不使用密封剂的样品进行了疲劳寿命分析和使用扫描电子显微镜的断口扫描。

更新日期:2021-03-30
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