The fracture was diverted from the main manner of intergranular fragile crack to the manner of intergranular fragile crack with partial dimple gliding fracture with the increase of temperature.

• 随着温度的升高 ,断裂方式由沿晶脆性断裂为主逐步过渡到沿晶脆性断裂和部分的韧窝韧性断裂的混合断裂方式。