基于微观组织演化的P91钢长时蠕变寿命预测*

doi:10.11896/j.issn.1005-023X.2017.010.028

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

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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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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.

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http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.010.028 或 http://www.mater-rep.com/CN/Y2017/V31/I10/137

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