英语翻译Fracture mode is predominantly ductile in base metal.How

Fracture mode is predominantly ductile in base metal。断裂类型在贱金属中其延展性在其性能上是占主导地位的。However,there exists intergranular fracture in the weld metal。然而,在焊接金属中还存在晶间断裂。The transition of fracture mode from base metal to weld metal may lead to dramatic decrease in fracture toughness。贱金属断裂类型过渡到焊接金属可能导致断裂韧度的严重减退。