PREDICTION OF CREEP CRACK GROWTH INCUBATION PERIODS
PREDICTION OF CREEP CRACK GROWTH INCUBATION PERIODS
复制标题
蠕变裂纹生长孵化期的预测
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
G. Webster
中科院分区：
文献类型：
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作者：
T. Austin;G. Webster
在蠕变裂纹扩展开始之前，通常会观察到一个孕育期。本文提出了一种仅从材料的应力持久性能和蠕变延性的知识来估计其持续时间的方法。对316L型不锈钢在600°C和1%CrMoV低合金钢在550°C的实验数据进行了比较。结果表明，良好的协议时，建立在裂纹尖端的过程区的损伤在开裂的早期阶段被纳入分析时，津贴。
An incubation period is often observed prior to the onset of creep crack growth. This paper presents a procedure for estimating its duration from a knowledge only of the stress rupture properties and creep ductility of a material. Comparisons are made with experimental data on type 316L stainless steel at 600°C and a 1% CrMoV low alloy steel at 550°C. It is shown that good agreement is achieved when allowance for a build up of damage in a process zone at the crack tip during the early stages of cracking is incorporated into the analysis.