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FATT是Fracture Appearance Transition Temperature的缩写,表示断面转变温度.当构件发生破坏时,人们会注意到它的断裂应力、变形情况、环境条件以及它的断口形貌,由此去分析材料的一系列特性以及服役条件下的行为,另一方面进行材质的复验,特别是V型夏比试样在不同温度下进行试验时,除了能量和塑性随温度变化外,观察试样断口,也将会明显地看到试样断口由纤维状转变到结晶状或者反之.现在大家公认的FATT则是指V型夏比冲击试样占有50%的晶状(或纤维状)断面时的温度. FATT试验在电站设备的选材和事故分析中经常应用,表1是电站设备断裂时温度和材料的FATT.从表中可看出,对电站设备材料控制FATT乃是相当
FATT is an abbreviation of Fracture Appearance Transition Temperature, which indicates the transition temperature of the section, and when the component breaks down, one notices its fracture stress, deformation, environmental conditions and its fracture morphology, thus analyzing a series of properties of the material As well as the behavior of service conditions, on the other hand, the re-inspection of materials, in particular the V-type Charpy test at different temperatures, in addition to energy and plasticity with temperature changes, the observation of the specimen fracture, it will be obvious To see the specimen fracture transition from fibrous to crystalline or vice versa now known as FATT V type Charpy impact specimen occupy 50% of the crystalline (or fibrous) section of the temperature when the FATT test Power plant equipment selection and accident analysis is often used, Table 1 is the power plant equipment temperature and material fracture FATT can be seen from the table, the power plant equipment control FATT is quite