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Tensile and Creep Testing of Sanicro 25 Using Miniature Specimens

机译:使用微型样品对Sanicro 25进行拉伸和蠕变测试

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摘要

Tensile and creep properties of new austenitic steel Sanicro 25 at room temperature and operating temperature 700 °C were investigated by testing on miniature specimens. The results were correlated with testing on conventional specimens. Very good agreement of results was obtained, namely in yield and ultimate strength, as well as short-term creep properties. Although the creep rupture time was found to be systematically shorter and creep ductility lower in the miniature test, the minimum creep rates were comparable. The analysis of the fracture surfaces revealed similar ductile fracture morphology for both specimen geometries. One exception was found in a small area near the miniature specimen edge that was cut by electro discharge machining, where an influence of the steel fracture behavior at elevated temperature was identified.
机译:通过在微型试样上进行测试,研究了新型奥氏体钢Sanicro 25在室温和700°C的温度下的拉伸和蠕变性能。结果与常规样本的测试相关。获得了非常好的结果一致性,即屈服强度和极限强度以及短期蠕变性能。尽管在微型试验中发现蠕变断裂时间在系统上较短,而蠕变延展性较低,但最小蠕变速率是可比的。断裂表面的分析表明,两种样品的几何形状都具有相似的延性断裂形态。在通过放电加工切割的微型试样边缘附近的一小区域发现了一个例外,在此可以确定高温下钢断裂行为的影响。

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