Fracture surface of the as quenched alloy is totally dimple transgranular type, while the failure mode of the aged alloy is a mixed type with intergranular and transgranular fracture.

• 固溶淬火态实验合金拉伸断口为完全穿晶韧窝型。 时效态合金的断裂方式为穿晶和沿晶混合型。