Research and development of magnetic non-destructive testing techniques

磁力无损检测技术的研究与开发

• 批准号: 203311-2007
• 负责人: Clapham, Lynann
• 金额: $ 2.04万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=362487
• 关键词: Research; development; magnetic; non; destructive

In high-impact fields such as the oil and gas and nuclear industries, the consequences of failures can be catastrophic.  My work involves the development of magnetic non-destructive evaluation (NDE) techniques to detect areas of localized high strain which threaten the integrity and safe operation of engineering systems.  Techniques based on magnetism are the best suited to strain measurement, since other methods (e.g. eddy current, ultrasonic) are much less strain sensitive.  However, the correlation between magnetic behaviour and strain is very complex in engineering materials and not well understood.   This Discovery grant funding will further my long term goals of understanding and exploiting the magnetic response of strain in ferromagnetic engineering materials.     The Magnetic Flux Leakage (MFL) and Magnetic Barkhausen Noise (MBN) techniques are well suited to strain measurement. MFL is used to find defects in oil and gas pipelines, but further development is necessary to adapt it for locating high-strain regions such as dents and gouges.  MBN is a leading candidate for finding stressed regions in the steel feeder tubes used in CANDU reactors, but there are many practical obstacles to its use.   The proposed grant will fund three projects: The first examines the relationship between magnetic behaviour and "intergranular" strain (strain in a particular crystallographic direction). The second study aims to characterize and understand the magnetic response of severely plastically deformed steels, enabling us to recognize the magnetic "signature" of dents and gouges.  The third aspect of the Discovery-grant funded work will look at some of the engineering aspects in adapting MBN probes to use in industry.      Finally, mine is the only university-based group in Canada to provide students with training and experience in magnetics engineering.  This training is extremely important in the science-based economic sector, and my graduates have found immediate employment in Canada's high-tech, oil and gas, and nuclear industries.

在石油、天然气和核工业等高影响领域，故障的后果可能是灾难性的。我的工作涉及开发磁性无损评估（NDE）技术，以检测威胁工程系统完整性和安全运行的局部高应变区域。基于磁性的技术最适合应变测量，因为其他方法然而，在工程材料中，磁行为和应变之间的相关性非常复杂，并且还没有得到很好的理解。 这项发现基金将进一步推动我的长期目标，即理解和利用铁磁工程材料中应变的磁响应。 漏磁（MFL）和磁巴克豪森噪声（MBN）技术非常适合应变测量。MFL用于发现石油和天然气管道中的缺陷，但需要进一步开发以使其适用于定位高应变区域，如凹痕和凿槽。MBN是CANDU反应堆中使用的钢进料管中发现应力区域的主要候选者，但其使用存在许多实际障碍。 拟议的赠款将资助三个项目：第一个项目研究磁性行为和“晶间”应变（特定晶体方向的应变）之间的关系。第二项研究的目的是描述和理解严重塑性变形钢的磁响应，使我们能够识别凹痕和凿痕的磁“特征”。第三项研究将着眼于使MBN探头适应工业使用的工程方面。 最后，我的团队是加拿大唯一一个为学生提供磁性工程培训和经验的大学团队。这种培训在以科学为基础的经济部门非常重要，我的毕业生在加拿大的高科技，石油和天然气以及核工业中找到了直接就业机会。