The proposal of Q* parameter and derivation of the law of creep crack growth life for a round bar specimen with a circular notch for Cr-Mo-V steel
The proposal of Q* parameter and derivation of the law of creep crack growth life for a round bar specimen with a circular notch for Cr-Mo-V steel
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DOI：
10.3184/096034004782749962
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发表时间：
2004-01-01
影响因子：
1.3
通讯作者：
Nikbin, K
中科院分区：
文献类型：
--
作者：
Adachi, T;Yokobori, AT;Nikbin, K
利用Cr-Mo-V钢圆棒圆缺口试样和基于电势降法提出的裂纹长度预测方程，进行了蠕变裂纹扩展试验，研究了多轴应力对蠕变裂纹扩展速率的影响。本文对该圆形缺口试件的蠕变裂纹扩展进行了较为详细的试验和分析，并推导了表征CCGR的Q*参数。利用Q*参数，推导了蠕变裂纹扩展寿命的预测规律。
Using a round bar circular notched specimen for Cr-Mo-V steel and the proposed equation predicting crack length on the basis of electric potential drop method, the creep crack growth tests were previously conducted to investigate the effect of multi-axial stress on creep crack growth rate(CCGR). In this paper, more detailed experiments and analyses on the creep crack growth were conducted and the Q* parameter which characterizes CCGR for this circular notched specimen was derived. Furthermore, using the Q* parameter, the prediction law of creep crack growth life was also derived.