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首页> 外文期刊>Materials at High Temperatures >Characterisation of crack growth behaviour for W-added 12%Cr ferritic heat resistant steel under the creep-fatigue interaction conditions
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Characterisation of crack growth behaviour for W-added 12%Cr ferritic heat resistant steel under the creep-fatigue interaction conditions

机译：蠕变疲劳条件下添加W的12％Cr铁素体耐热钢的裂纹扩展行为

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摘要

The W-added 12%Cr ferritic heat resistant steel has been developed as a turbine rotor material which is used under high temperature creep-fatigue conditions. In this study, crack growth tests using C(T) specimen under the creep-fatigue interaction conditions were conducted under various conditions of stress holding time, applied stress and temperatures. As a result, the effect of load frequency on crack growth behaviour and its life for this steel was characterised by the three-dimensional curved surface based on the concept of non-equilibrium science. Furthermore, a predictive law of crack growth life under the creep-fatigue interaction conditions was derived based on the concept of Q* with the transition function of crack growth life from fatigue to creep.
机译：已开发出添加了W的12％Cr铁素体耐热钢作为涡轮转子材料，可在高温蠕变疲劳条件下使用。在这项研究中，在各种应力​​保持时间，施加应力和温度条件下，使用C（T）试样在蠕变疲劳相互作用条件下进行了裂纹扩展测试。结果，载荷频率对这种钢的裂纹扩展行为及其寿命的影响通过基于非平衡科学概念的三维曲面表征。此外，基于Q *的概念，推导了蠕变疲劳条件下裂纹扩展寿命的预测规律，该函数具有从疲劳到蠕变的裂纹扩展寿命的过渡函数。

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