U.S.-Czech Materials Research on Modeling of Magnetization for Evaluation of Microstructure

INT 9732135 JilesThis美国-捷克州立大学爱荷华州的大卫贾尔斯和合作伙伴布拉格捷克物理研究所的拉迪斯拉夫·普斯特和伊万·托马斯之间的研究项目将通过开发相关磁化过程的计算机模型来研究磁性材料的结构和性能之间的关系。 这些努力将具有能量耗散作为磁化的结果，其中布洛赫壁与具有与基质不同的磁性的区域相互作用。 研究人员打算强调磁畴壁对较大空隙、非磁性夹杂物和高局部应力区域的钉扎。这项合作工作将涉及将理论模型计算与铁基和镍基合金的实验测量数据进行比较。 结果应该为材料的磁性描述提供一个更完整的理论框架，即，磁滞曲线建模，从而提高我们的理解微观结构对磁性能的影响。 如果成功的话，研究结果可能会应用于磁性无损评估方法，这是材料研究和工程领域广泛关注的领域。该理论材料研究项目实现了通过使美国和中欧的专家能够联合收割机互补人才和共享共同感兴趣和能力的领域的研究资源来推进科学知识的计划目标。

INT 9732135JilesThis U.S.-Czech research project between David Jiles of Iowa State University and partners, Ladislav Pust and Ivan Tomas of the Czech Institute of Physics, Prague, will examine the relationship between structure and properties of magnetic materials by developing computer based models of relevant magnetization processes. These efforts will feature energy dissipation as a result of magnetization where Bloch walls interact with regions that have different magnetic properties from the matrix. The researchers intend to emphasize pinning of magnetic domain walls on larger voids, non-magnetic inclusions, and regions of high localized stress.This cooperative work will involve comparing theoretical model calculations with experimental data measured on iron and nickel based alloys. Results should provide a more complete theoretical framework for the description of magnetic properties of materials, i.e., hysteresis curve modeling, thereby improving our understanding of microstructural effects on magnetic properties. If successful, findings may be applied in magnetic nondestructive evaluation methods, an area of broad interest in materials research and engineering.This project in theoretical materials research fulfills the program objective of advancing scientific knowledge by enabling experts in the United States and Central Europe to combine complementary talents and share research resources in areas of strong mutual interest and competence.