Model of Magnetic Barkhausen Noise for Characterization of Steel Materials

这项科学研究的目标是开发便携式表面磁巴克豪森噪声（MBN）的能力，非破坏性表征铁磁性钢的性能。目标包括残余应力、塑性变形程度、晶粒尺寸、碳含量、晶体结构、磁各向异性以及在电工钢的情况下铁损的综合测量。这项工作的动机是需要快速识别钢材类型和评估结构内的应力状态，如潜艇和船体，石油和天然气管道，电机或Transformer层压板，飞机起落架和结构可能发生局部损坏和/或维修的情况。开发工具、分析方法和建模，沿着识别影响测量结果的因素，将促进MBN分析的应用，并提高其作为钢材识别和表征的诊断工具的潜力。

The goal of this scientific investigation is to develop portable surface magnetic Barkhausen noise (MBN) capability for non-destructive characterization of ferromagnetic steel properties. The goal includes combined measurement of residual stress, degree of plastic deformation, grain size, carbon content, crystallographic texture, magnetic anisotropy and, in the case of electrical steels, core loss. Motivation for this work is the requirement for rapid identification of steel type and evaluation of stress state within structures such as submarine and ship hulls, oil and gas pipelines, motor or transformer laminates, landing gear in aircraft and cases where structures may have undergone localized damage and/or repair. Development of tools, analysis methods and modeling, along with identification of factors that affect the measurement outcome will facilitate application of MBN analysis and advance its potential as a diagnostic tool for identification and characterization of steel materials.