Non-Destructive evaluation of creep and creep fatigue crack growth in 316 Stainless Steel

这个项目的目的是了解目前的无损检测系统的性能，用于尺寸裂纹在蠕变和蠕变疲劳裂纹扩展测试。蠕变性能评估是核反应堆高温部件寿命评估的重要内容。这项工作已经评估了常规使用的蠕变裂纹尺寸系统的性能。已经发现，在确定不连续裂纹的尺寸方面存在一些限制。该项目现在的重点是开发和评估一种基于超声的测量系统，以准确确定不连续蠕变裂纹的尺寸。

This project aims to understand the performance of current NDE systems used to size cracks during creep and creep fatigue crack growth testing. Evaluating creep performance is important for life evaluation of high temperature components in nuclear reactors. This work has evaluated the performance of conventionally used creep crack sizing systems. it has been found that there are some limitations in sizing discontinuous cracks. The project has now focussed on developing and evaluating an ultrasound-based measurement system to accurately size discontinuous creep cracking.