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首页> 外文期刊>Engineering failure analysis >Fracture characteristics of thermally exposed 9Cr-lMo steel after tensile and impact testing at room temperature
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Fracture characteristics of thermally exposed 9Cr-lMo steel after tensile and impact testing at room temperature

机译：在室温下进行拉伸和冲击试验后，热暴露的9Cr-1Mo钢的断裂特性

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The paper deals with the fracture analysis of thermally exposed 9Cr-1 Mo ferritic steel after tensile and impact testing at room temperature. The temperatures of the thermal expositions were 580, 620, and 650 deg C, respectively. The duration of annealing experiments varied from 500 to 5000 h. The influence of thermal expositions on Vickers hardness as well as tensile properties was found to be negligible. On the other hand, remarkable effects of the annealing on room temperature impact toughness were observed. Fracture behaviour of the 9Cr-lMo steel is strongly affected by the presence of precipitates of secondary phases. Fracture surfaces of tensile samples indicate mainly transgranular dimple fracture mechanism. By contrast, the fracture mode of the samples after impact testing is more complex. It shows both - ductile dimple tearing as well as inter-lath decohesion.
机译：本文在室温下进行拉伸和冲击测试后，对受热暴露的9Cr-1 Mo铁素体钢进行了断裂分析。热暴露的温度分别为580、620和650℃。退火实验的持续时间从500到5000小时不等。发现热暴露对维氏硬度以及拉伸性能的影响可以忽略。另一方面，观察到退火对室温冲击韧性的显着影响。 9Cr-1Mo钢的断裂行为受到次级相沉淀物的强烈影响。拉伸样品的断裂表面表明主要是经颗粒酒窝断裂机制。相反，冲击试验后样品的断裂模式更为复杂。它同时显示了-韧性凹痕撕裂以及板条间脱粘。

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