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- Title
Experiment on the relationship between the magnetic field variation and tensile stress considering the loading history in U75V rail steel.
- Authors
Bao, S; Hu, S N; Lin, L; Gu, Y B; Fu, M L
- Abstract
Metal magnetic memory (MMM) testing was performed on plate samples of U75V steel exposed to tensile loads. The variation characteristics of the magnetic field were obtained and there clearly existed a single-valued relationship between the applied tensile stress and the average of the tangential magnetic component as well as the slope of the normal magnetic component curve. A comparison of the magnetic variations in U75V and Q345 steels demonstrated that the magnetic properties were unique attributes of the material. Further analysis of the experimental results indicated that the magnetic field variation depended not only on the existing damage state but on the plastic deformation caused by the loading history. The magnetic responses corresponding to different plastic deformations were unique until the applied stress exceeded the prior maximum history stress. This revealed that the loading history could conspicuously influence the evolution of the magnetic field and, in order to detect the actual stressed state accurately, its effect should be considered.
- Subjects
MAGNETIC memory (Computers); STEEL testing; MAGNETIC field measurements; TENSILE tests; MATERIAL plasticity
- Publication
Insight: Non-Destructive Testing & Condition Monitoring, 2015, Vol 57, Issue 12, p683
- ISSN
1354-2575
- Publication type
Article
- DOI
10.1784/insi.2015.57.12.683