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首页> 外文期刊>Materials Science Research International >Creep and Fatigue Properties of Newly Developed Ferritic Heat-Resisting Steels for Ultra Super Critical (USC) Power Plants
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Creep and Fatigue Properties of Newly Developed Ferritic Heat-Resisting Steels for Ultra Super Critical (USC) Power Plants

机译：新开发的超超临界（USC）电厂铁素体耐热钢的蠕变和疲劳性能

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摘要

This paper studies creep, fatigue and creep-fatigue interaction properties of several ferritic steels such as conventional Mod.9Cr-1Mo, 9～12Cr-2W steels, newly produced boron- or palladium-added 9Cr-3W steels, high strength oxide dispersion strengthened (ODS) ferritic steels, and a precipitation hardening carbon-free martensitic steel. From the tests, two conclusions were derived to improve the creep-fatigue interaction strength. One is to have high creep ductility, and second is to decrease plastic strain of cyclic deformation by ultra high strengthening. From a viewpoint of evaluation of the creep-fatigue life, the analysis by ductility normalized strainrange partitioning method explained well the effects of creep ductility and strength of the materials on the creep-fatigue interaction.
机译：本文研究了几种铁素体钢的蠕变，疲劳和蠕变疲劳相互作用特性，例如传统的9Cr-1Mo，9〜12Cr-2W钢，新生产的添加硼或钯的9Cr-3W钢，高强度氧化物弥散强化（ODS）铁素体钢和沉淀硬化无碳马氏体钢。从测试中得出两个结论，以改善蠕变疲劳相互作用强度。一是具有高的蠕变延展性，二是通过超高强度降低循环变形的塑性应变。从评估蠕变疲劳寿命的观点出发，通过延性归一化应变范围划分方法进行的分析很好地解释了蠕变延性和材料强度对蠕变疲劳相互作用的影响。

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