The results show that the HAZ microfissuring damage of superalloy EBW joints induces mechanical properties deterioration which is attributed to the EBW thermal shock.

• 结果表明，热冲击是高温合金电子束焊接热影响区的微裂纹损伤的主要原因，热冲击损伤效应导致接头力学性能的劣化。