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High temperature fatigue: behaviour of three typical classes of structural materials

机译：高温疲劳：三种典型结构材料的性能

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The goals of this paper are: (i) to review the mechanisms of cyclic deformation, damage accumulation and crack propagation in three types of materials widely used in power generation industries, i.e. Cr-Mo steels, austenitic stainless steels and superalloys used in jet engine turbines (both Ni base and Fe-Ni base) when they are tested at elevated temperature; (ii) to relate these mechanisms to engineering applications; (iii) to review life prediction methodologies including thermomechanical fatigue (TMF); and (iv) to point out current and likely future trends in the development of more fatigue resistant materials and life prediction methods. The emphasis is laid on the creep-fatigue-oxidation behaviour of the two first classes of materials, i.e. 9-12% martensitic Cr steels and austenitic stainless steels. As the major issue for the design of components used in power generation industries is the extrapolation of short term laboratory data to much longer times, only physically based models for life prediction are examined. In Ni base superalloys, the emphasis is laid on the effect of oxidation on fatigue crack growth rate at elevated temperature and on their behaviour in TMF
机译：本文的目标是：（i）回顾在发电行业中广泛使用的三种类型的材料，即Cr-Mo钢，奥氏体不锈钢和喷气发动机中使用的超合金的循环变形，损伤累积和裂纹扩展的机理。在高温下测试涡轮（镍基和铁镍基）; （ii）将这些机制与工程应用联系起来; （iii）审查寿命预测方法，包括热机械疲劳（TMF）; （iv）指出在开发更多抗疲劳材料和寿命预测方法方面的当前和未来的趋势。重点放在两种第一类材料，即9-12％的马氏体Cr钢和奥氏体不锈钢的蠕变疲劳氧化行为上。由于用于发电行业的组件设计的主要问题是将短期实验室数据外推到更长的时间，因此仅检查了基于物理的寿命预测模型。在镍基高温合金中，重点放在高温下氧化对疲劳裂纹扩展速率的影响及其在TMF中的行为

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