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材料导报编辑部  2017, Vol. 31 Issue (10): 137-140    https://doi.org/10.11896/j.issn.1005-023X.2017.010.028
  计算模拟 |
基于微观组织演化的P91钢长时蠕变寿命预测*
朱麟,刘新宝,辛甜,潘成飞,刘剑秋
西北大学化工学院, 西安 710069
Prediction of Long-term Creep Rupture Time of P91 Steel Based on Microstructure Evolution
ZHU Lin, LIU Xinbao, XIN Tian, PAN Chengfei, LIU Jianqiu
School of Chemical Engineering,Northwest University, Xi’an 710069
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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(M23C6、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873 K(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。
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朱麟
刘新宝
辛甜
潘成飞
刘剑秋
关键词:  材料科学基础科学  蠕变寿命预测  微观组织演化  内应力    
Abstract: According to the analysis of microstructure evolution of P91 heat-resistant steel during the long-term creep, main factors determining its creep rupture time were discussed in detail, such as the coarsing of precipitated phases (M23C6, MX, Laves phase and Z phase) and interactions between them and dislocations. Based on these results, a prediction model of creep rupture time for P91 heat-resistant steel was provided by introducing the internal stress to power-law creep equation and Monkman-Grant equation. Besides, the calculated creep rupture time at 873 K with the proposed model was very close to those values obtained by experiments, which further confirmed that the present method based on the microstructure evolution offers a potential tool to predict the long-term creep rupture time of P91 heat-resistant steel.
Key words:  foundational disciplines in materials science    creep rupture time prediction    microstructure evolution    internal stress
发布日期:  2018-05-08
ZTFLH:  TG144  
基金资助: *国家自然科学基金(51371142)
通讯作者:  刘新宝,男,1976年生,教授,博士研究生导师,研究方向为先进能源化工装备材料制备、材料损伤分析与信赖域评价、材料组织控制与物理性能评价E-mail:xbliu2011@163.com   
作者简介:  朱麟:男,1993年生,博士研究生,研究方向为金属材料蠕变性能及可靠性评价E-mail:18717379109@163.com
引用本文:    
朱麟,刘新宝,辛甜,潘成飞,刘剑秋. 基于微观组织演化的P91钢长时蠕变寿命预测*[J]. 材料导报编辑部, 2017, 31(10): 137-140.
ZHU Lin, LIU Xinbao, XIN Tian, PAN Chengfei, LIU Jianqiu. Prediction of Long-term Creep Rupture Time of P91 Steel Based on Microstructure Evolution. Materials Reports, 2017, 31(10): 137-140.
链接本文:  
https://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.010.028  或          https://www.mater-rep.com/CN/Y2017/V31/I10/137
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