A more accurate constraint parameter to characterize the creep constraint effect at crack tip of Cr-Mo-V steel

被引：0
|
作者：
Luo Y. [1 ]
Zhang Q. [2 ]
Jiang W.C. [1 ]
机构：
[1] College of Chemical Engineering, China University of Petroleum (East China), Qingdao
[2] College of Mechanical and Electronic Engineering, China University of Petroleum (East China), Qingdao
来源：
Key Engineering Materials | 2019年 / 795卷
基金：
中国国家自然科学基金;
关键词：
Constraint parameter; Cr-Mo-V steel; Creep constraint effect; Creep crack growth;
D O I：
10.4028/www.scientific.net/KEM.795.79
中图分类号：
学科分类号：
摘要：
A suitable constraint parameter is a key to quantify the creep crack tip constraint levels. In this study, a new more accurate creep constraint parameter As of Cr-Mo-V steel was proposed based on the existing constraint parameters R* and Ac. The CCG rate equation of Cr-Mo-V steel related to the constraint parameter As is obtained. The results show that the constraint parameter As is basically unchanged with the increase of creep time. The crack growth data predicted by the constraint dependent CCG rate equation are in good agreement with the experimental data. The established constraint dependent CCG rate equation can predict the CCG rate at other constraint levels very well. © 2019 Trans Tech Publications Ltd, Switzerland.
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页码：79 / 85
页数：6
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