High Sensitivity Electromagnetic Testing of Hi-Tech and Safety Critical Metal Components

这个为期4年的博士iCASE项目将研究将高频电流引入金属部件的新方法，以测试它们的小表面缺陷和裂纹（<0.5mm长）-超出目前可行的极限。华威大学开发了一些新的仪器，能够在金属样品（如钛）的表面感应电流（涡流），频率超过15MHz，远远超过目前可用的频率。我们使用特殊设计的线圈，将其放置在靠近样品的位置，但不接触样品，然后使用这些电流产生的磁场来确定样品的电磁特性是否有变化，这可能是由材料降解或小裂纹引起的。在喷气发动机涡轮叶片等部件上，即使是最小的裂缝也可能是灾难性的，因为这些部件可能暴露在高应力和高温下。该项目将为博士生提供机会，将他们的基础物理知识应用和发展到现实世界的问题中，研究将提高安全性并产生一些新的测量技术的设备和分析。该项目将与EPSRC资助的濒死体验研究中心的学术和工业成员密切合作。

This 4 year PhD iCASE project will undertake research into new methods of inducing high frequency currents into metal components to test them for small surface defects and cracks (<0.5mm long) - beyond the limits of what is currently viable. The University of Warwick has developed some new instrumentation that is capable of inducing currents (eddy currents) in the surface of a metal sample such as titanium, at frequencies over 15MHz - far beyond what is available at the moment. We do this using specially designed coils that are positioned close to the sample, but do not touch the sample, and then using the magnetic field arising from these currents to determine if there are changes in the electromagnetic properties of the sample, that could be caused by material degradation or small cracks. The presence of even the smallest cracks on components such as jet engine turbine blades could be catastrophic due to the high stresses and temperatures that these components can be exposed to. This project will provide the PhD student the chance to apply and develop their knowledge of the underlying physics to a real world problem, working on equipment and analysis that will improve safety and produce some novel new measurement techniques.The project will work closely with academic and industrial members of the EPSRC funded Research Centre for NDE.