This paper examined the joining zone between semi-crystalline polyamide 6 and aluminum EN AW 6082 in laser-based joining and evaluated the mechanical properties of the joint. The joint tests were carried out in overlap configuration and a characterized in terms of energy per unit length. The mechanical properties were examined to the point of cohesive failure. An increasing energy per unit length resulted in a reduced crosshead displacement in short-term testing and a decreased fatigue strength. Further material testing was carried out locally at various positions within the joining zone. The mechanical properties were correlated with results of a hardness test, thermoplastic morphology, differential scanning calorimetry (DSC), and X-ray diffraction (XRD). By combining the findings with heat-treated samples at elevated temperatures, secondary crystallization was identified and evidenced as a primary effect among the changes in mechanical properties due to the heat treatment of the thermoplastic material.

本文研究了基于激光的连接中半结晶聚酰胺6与铝EN AW 6082之间的连接区域，并评估了连接的机械性能。联合测试以重叠配置进行，并以每单位长度的能量为特征。检查机械性能至内聚破坏点。单位长度能量的增加导致短期测试中十字头的位移减少，疲劳强度降低。在连接区内的不同位置局部进行了进一步的材料测试。力学性能与硬度测试，热塑性形态，差示扫描量热法（DSC）和X射线衍射（XRD）的结果相关。将结果与高温下的热处理样品结合起来，