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.
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。
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The crack propagation rate of pipes is mainly dependent on FATT of Steels of pipes (fracture appearance transitiontemperature). And FATT can be measured by drop weighted tear tests.