Evaluation of residual stress in ferromagnetic steels based on residual magnetic field measurements

2012 ◽  
Vol 45 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Maciej Roskosz ◽  
MichaŁ Bieniek
Keyword(s):  
Magnetic Field ◽  
Residual Stress ◽  
Field Measurements ◽  
Magnetic Field Measurements ◽  
Residual Magnetic Field ◽  
Ferromagnetic Steels

Evaluation of Residual Stresses in Butt-Welded Joints by Residual Magnetic Field Measurements

2012 ◽  
Vol 217-219 ◽  
pp. 2427-2434 ◽  
Author(s):  
Bin Liang ◽  
Jian Ming Gong ◽  
Hai Tao Wang ◽  
Cheng Ye
Keyword(s):  
Residual Stress ◽  
Quantitative Method ◽  
Normal Component ◽  
Field Measurements ◽  
Stray Field ◽  
The Finite Element Method ◽  
Promising Tool ◽  
Magnetic Field Measurements ◽  
Ferromagnetic Steels ◽  
Welded Seam

Measuring residual stray field (RMF) signals provides a promising tool to analyze the stress in ferromagnetic welded materials. In this paper, the variations of the normal component of the RMF, Hp(y), perpendicular to welded seam are measured. The finite element method is used to model residual stress in the specimen. The influence of residual stress on the Hp(y) component is shown. It is found that the distributions of the Hp(y) component are described by a Boltzmann fitting curve, show a good qualitative correlation with residual stress. A quantitative method for the evaluation of residual stress in ferromagnetic steels based on the gradient of the Hp(y) component and equivalent (vonMises) stress is presented.

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