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。
The tensile fracture of 3j21 alloy is a dimple fracture 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3J 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。
The fractures of the alloys change from dimple to cleavage fracture with river pattern.
合金的断口形貌由韧窝向河流花纹状的解理形貌转变。
It was found that the room-temperature fracture of the under-aged 3j21 alloy was of a dimple, while the low-temperature fracture assumed a mixed rupture feature.
结果表明：欠时效态3J 21合金的室温断口为韧窝断口，而低温断口呈现混合断裂特征。
The fracture appearance is dimple at room temperature, it changes into intercrystalline fracture at low-temperature.
其冲击断口微观形貌由室温时的韧窝断口逐渐变为低温下的塑性沿晶断口。
The composite displays the fracture features of the dimple and intergranular fracture.
复合材料的断裂形貌为韧窝加沿晶断裂。
The fracture of the material was diverted from the manner of intergranular brittle fracture to the manner of intergranular brittle fracture with dimple gliding fracture.
材料的断裂方式由沿晶脆性断裂转变为沿晶脆性断裂和韧窝韧性断裂的混合断裂方式。
The chief character of fracture is fatigue striation and dimple.
断口分析表明，合金低周疲劳断口的主要特征是平行的条纹及韧窝。
The fracture of composites assumes toughness dimple.
复合材料的拉伸断口假设为韧窝混合断裂。
The fracture of composites assumes toughness dimple.
复合材料的拉伸断口假设为韧窝混合断裂。
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