Electromagnetic (EM) sensor measurement for residual stress characterisation in welded steel plates
Electromagnetic (EM) sensor measurement for residual stress characterisation in welded steel plates
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DOI：
10.1080/10589759.2023.2194649
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发表时间：
2023-04
影响因子：
2.6
通讯作者：
Edosa Osarogiagbon;R. Hall;Lei Zhou;J. Cafolla;C. Davis
中科院分区：
文献类型：
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作者：
Edosa Osarogiagbon;R. Hall;Lei Zhou;J. Cafolla;C. Davis
摘要残余应力可能导致结构完整性的损害；最好使用无损检测来评估残余应力，以便能够预测对结构性能的影响。电磁(EM)传感器可用于表征钢中的残余应力，并考虑到微观结构和几何效应。利用电磁传感器对EN S275钢板焊接后的残余应力进行了表征。使用低频、低磁场电磁传感器来评估板材中的残余应力。在COMSOL软件中建立了传感器和试件的有限元模型，可以预测和考虑焊缝几何形状和显微组织的影响。这使得可以通过EM传感器测量来确定残余应力，排除几何和微结构影响，使用X射线衍射仪来验证EM传感器测量结果。焊缝附近的残余应力最大，X射线衍射仪、小型电磁传感器(U-12.7)和大型电磁传感器(U-31)的残余应力分别为170±5、120±20和42±10 MPa。这种差异是由于每种测量类型测量的材料的体积不同造成的。结果表明，电磁场传感器能够很好地测量焊接板的残余应力。
ABSTRACT Residual stresses can cause compromise in structural integrity; it is desirable to assess residual stresses using non-destructive testing so that effects on structural properties can be predicted. Electromagnetic (EM) sensors can be used to characterise residual stresses in steels accounting for, microstructure and geometry effects. Residual stress characterisation in welded EN S275 steel plates using EM sensors is reported. Low-frequency, low-magnetic field EM sensors were used to assess residual stresses in the plates. A finite element model for the sensor and sample was generated in COMSOL software so the influence of weld bead geometry and microstructure could be predicted and accounted for. This allowed residual stresses to be determined from EM sensor measurements, excluding the geometry and microstructure effects, XRD was used to verify EM sensor measurements. The highest residual stresses were found adjacent to the weld fusion zone, with magnitudes of, 170±5MPa, 120±20MPa and 42±10MPa for X-ray diffraction (XRD), a small EM sensor (U-12.7) and a big EM sensor (U-31) types, respectively. The differences are due to the volume of the material measured by each measurement type. It was shown that EM sensors are capable of measuring residual stress in welded plates to a good level of accuracy.