Table 2: Parameters of heat treatments.

SampleParameters of heat treatments

1Laser-welded joint with no heat treatment
2540°C × 6 h solution treatment + 200°C × 2 h aging treatment
3540°C × 6 h solution treatment + 200°C × 8 h aging treatment
4540°C × 6 h solution treatment + 200°C × 64 h aging treatment
5540°C × 6 h solution treatment + 225°C × 8 h aging treatment
6540°C × 6 h solution treatment + 225°C × 64 h aging treatment