高锰奥氏体钢随温度降低其断裂机制由韧窝状断裂转变到晶界断裂。
High manganese steels undergo a ductile to brittle transition at low temperature, which is accompanied by a change in the fracture mechanism from dimple fracture to intergranular fracture.
多晶材料裂纹沿着晶界扩展而断裂。
Intergranular fracture. Fracture of polycrystalline materials by crack propagation along grain boundaries.
在晶界上形成形态复杂稳定的碳化物能阻止空洞的连接，从而延长了蠕变第三阶段，增加了断裂时间。
The stable eutectic carbides with complex morphologyprevent coalescence of grain boundary voids and therefore prolong tertiary creep stage and rupture time.
断裂发生在近焊缝处，断裂的特点是沿晶界的。
Rupture occurs near the bond zone. The characteristics of fracture are intergranular.
研究表明，弯曲晶界对裂纹的萌生、长大及扩展，对裂纹的形态及断裂方式，都有显著的影响。
It is shown that the zigzag grain boundary may delay the initiation, growth and propagation of crack, as well as may also influence the crack morphology and the fracture mode markedly.
结果表明，变形温度愈高，晶界结合强度愈低，沿晶断裂愈明显，晶界滑动愈易实现；
The results showed that the grain boundary cohesion become weaker and intergranular fracture became dominant with the increasement of superplastic deformation temperature.
综述和简要评价了晶界偏聚和材料脆性断裂之间关系的理论研究进展情况。
An overview of the recent progress in the theoretical study of relationship between grain-boundary segregation and brittle fracture is provided.
在最佳超塑性条件下，断口中形成了大而深的空洞，晶界滑动和晶间断裂特征明显。
The deep and large cavities are formed on fracture surface and grain boundary sliding and intergranular fracture characteristic is obvious on the optimal superplastic deformation condition.
在最佳超塑性条件下，断口中形成了大而深的空洞，晶界滑动和晶间断裂特征明显。
The deep and large cavities are formed on fracture surface and grain boundary sliding and intergranular fracture characteristic is obvious on the optimal superplastic deformation condition.
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