High manganese steels undergo a ductile to brittle transition at low temperature, which is accompanied by a change in the fracture mechanism from dimplefracture to intergranular fracture.
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。
2
The tensile fracture of 3j21 alloy is a dimplefracture at peak-aged state. The distance between the slip lines is larger in the microstructure near the fracture of the alloy at under-aged state.
峰时效态3 J 21合金的拉伸断口为韧窝断口，断口附近显微组织中滑移线之间的距离大。
3
The fractures of the alloys change from dimple to cleavage fracture with river pattern.