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

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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

Published: 08 May 2018

CLC number:

TG144

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	Articles by authors
	ZHU Lin
	LIU Xinbao
	XIN Tian
	PAN Chengfei
	LIU Jianqiu

Cite this article:

ZHU Lin,LIU Xinbao,XIN Tian, et al. Prediction of Long-term Creep Rupture Time of P91 Steel Based on Microstructure Evolution[J]. Materials Reports, 2017, 31(10): 137-140.

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

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