基于微观组织演化的P91钢长时蠕变寿命预测

发布时间：2018-04-01 15:41

  本文选题：材料科学基础科学　切入点：蠕变寿命预测　出处：《材料导报》2017年10期

【摘要】：通过对P91耐热钢在高温长时蠕变过程中微观组织演化行为的综合考察,探讨了影响其长时蠕变寿命的主要因素,其中包括强化相(M_(23)C_6、MX)与析出相(Laves、Z相)的粗化现象以及和位错间的交互作用等。在此基础上,通过对蠕变幂率本构方程中耦合相应内应力参量,并结合Monkman-Grant方程,从微观组织演化的角度建立了P91耐热钢长时蠕变寿命预测模型。最后利用该模型对873K(600℃)时的P91耐热钢的相关蠕变寿命进行了预测,结果显示其计算数值与实验数据吻合较好,从而进一步表明基于微观组织演化的预测模型在P91耐热钢长时蠕变寿命的研究中具有重要意义。
[Abstract]:Based on the comprehensive investigation of microstructure evolution behavior of P91 heat resistant steel during high temperature and long term creep, the main factors influencing its long term creep life are discussed. These include the coarsening phenomenon of M / M _ (23) C _ (6) M _ X) and the interaction between M _ 2O _ 2 and dislocation. On this basis, the corresponding internal stress parameters are coupled to the creep power rate constitutive equation, and the Monkman-Grant equation is combined. The prediction model of long term creep life of P91 heat resistant steel is established from the point of view of microstructure evolution. Finally, the related creep life of P91 heat resistant steel at 873K(600 鈩，

本文编号：1696179