US-India Cooperative Research: Magnetic Evaluation of Fatigue Damage and Deformation

0138400 Jiles描述：该奖项支持美国-印度合作研究题为疲劳损伤和变形的磁性评估。 合作者大卫贾尔斯，爱荷华州州立大学和阿米塔瓦米特拉，国家冶金实验室，贾姆谢德布尔将进行先进的无损评价（NDE），以获得测量材料的结构在微米尺度上使用磁力显微镜和扫描霍尔传感器显微镜。这将提高对微观结构和磁性能之间关系的理解，然后可以用来解释传统的磁性NDE测量结果。 测量数据将通过使用磁Preisach模型的新方法对材料中的磁化过程进行数学建模进行分析。 研究目标是获得有关如何可靠地使用磁性检测方法来推断疲劳和变形过程中结构和应力状态变化的具体细节。 这将大大提高预测能力的磁性检测技术估计剩余寿命的组件。范围：的想法，磁性测量可以确定材料的疲劳损伤和变形具有很大的潜力和高度相关的工程师和材料科学家的科学界。 对于社会来说，检测组件中即将发生的故障可能对民用，航空航天和机械结构产生重大影响。 Jiles是美国使用磁性方法进行NDE的权威。 与印度国家冶金实验室科学家的合作将充分利用两个实验室的优势。 根据这项资助，两名美国研究生将有机会参与贾姆谢德布尔国家冶金实验室的实验工作。该项目由印度科学技术部（DST）和NSF的国际科学工程办公室以及土木和机械系统部支持。

0138400Jiles Description: This award supports the US-India cooperative research entitled Magnetic Evaluation of Fatigue Damage and Deformation. Collaborators David Jiles, Iowa State University and Amitava Mitra, National Metallurgical Laboratory, Jamshedpur will conduct advanced Non-Destructive Evaluations (NDE) to obtain measurements on the structure of materials at the micrometer scale by using magnetic force microscopy and scanning Hall sensor microscopy. These will improve understanding of the relationships between microstructure and magnetic properties, which can then be used to interpret the results of traditional magnetic NDE measurements. The measurement data will be analyzed through mathematical modeling of the magnetization processes in materials using a new approach to the magnetic Preisach model. The research goal is to obtain specific details on how magnetic inspection methods can reliably be used to infer changes in structure and stress states during fatigue and deformation processes. This will greatly enhance the predictive capabilities of magnetic inspection techniques for estimating the remaining lifetime of components.Scope: The idea that magnetic measurements could determine fatigue damage and deformation in materials has great potential and high relevance for the scientific community of engineers and materials scientists. For society, detection of impending failure in components could have significant impact for civil, aerospace, and mechanical structures. Jiles is the authority in the United States on using magnetic methods for NDE. The collaboration with the Indian scientists at National Metallurgical Laboratory will leverage the strengths of both laboratories. Under this grant, two US graduate students will have the opportunity to participate in the experimental work at the National Metallurgical Laboratory in Jamshedpur. This project is supported by the Indian Department of Science and Technology (DST) and by NSF's Office of International Science & Engineering and the Division of Civil and Mechanical Systems.