This study deals with an experimental investigation of the influence of friction stir welding parameters on the subsequent formability during incremental forming of aluminium alloy 6082-T6 blanks. Five welding conditions are considered, based on different combinations of rotational speed and feed rate. Truncated cones are chosen as benchmarks for single point incremental forming and tested up to their rupture limits. Formability is inferred measuring the cone height values, together with strain distributions, as recorded on the outer surface. The results clearly highlight the detrimental influence of a high feed rate of 100^− 1at the friction stir welding stage, leading to a significantly reduced formability in incremental forming. Regarding other parameters, formability levels are similar to those of the unwelded blanks. Local mechanical properties are investigated by means of hardness measurements, to assess the evolution through the weld, and conventional tensile tests. Digital image correlation is used to properly capture the highly heterogeneous strain field and as a result, to estimate the local yield stress levels. The stress mismatch between the heat affected zone and the nugget zone presents the same trend as the formability. Finally, scanning electron microscopy observations of the fractured samples in tension highlight more differences between the base material and the welded specimen than between the different welded ones. This study therefore emphasises the importance and relevance of an integrated mechanical design approach, considering both welding and forming processes as a whole.

本研究涉及搅拌摩擦焊参数对铝合金 6082-T6 毛坯渐进成形过程中后续成形性影响的实验研究。根据转速和进给率的不同组合，考虑了五种焊接条件。截锥被选为单点渐进成型的基准，并测试到它们的断裂极限。通过测量锥体高度值以及外表面记录的应变分布来推断成形性。结果清楚地突出了 100 ^{− 1}的高进给率的不利影响在摩擦搅拌焊接阶段，导致渐进成形的可成形性显着降低。关于其他参数，可成形性水平与未焊接坯料的相似。通过硬度测量来研究局部机械性能，以评估通过焊缝和常规拉伸试验的演变。数字图像相关用于正确捕获高度异质应变场，从而估计局部屈服应力水平。热影响区和熔核区之间的应力失配呈现出与成形性相同的趋势。最后，拉伸断裂样品的扫描电子显微镜观察突出了母材和焊接试样之间的差异，而不是不同焊接试样之间的差异。