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| Azevedo, Nuno Monteiro |
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Biruu, Dr Firew Abera
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Topics
Publications (8/8 displayed)
- 2023A Novel Method for Detecting the Onset and Location of Mechanical Failure by Correlating Engineering Stress with Changes in Magnetic Properties of UNS S32205 Duplex Stainless Steel Using Quantum Well Hall Effect Sensors
- 2019Surface-breaking flaw detection in mild steel welds using quantum well hall effect sensor devicescitations
- 2018Surface-Breaking Flaw Detection in Mild Steel Welds using Quantum Well Hall Effect Sensor Devices
- 2018A Comparative Study of Electromagnetic NDE Methods and Quantum Well Hall Effect Sensor Imaging for Surface-Flaw Detection in Mild Steel Welds
- 2018An Automated Two-Dimensional Magnetic Field Scanner based on Quantum Well Hall Effect Sensor for Non-Destructive Testing
- 2017A real time quantum well hall effect 2D handheld magnetovision system for ferromagnetic and non-ferromagnetic materials non-destructive testing
- 2016Non-destructive detection of defects in materials by a hand-held QWHE magnetic scanner
- 2016A quantum well hall effect sensor based handheld magnetic scanner with programmable electromagnetic coil for non-destructive testing of ferromagnetic and non-ferromagnetic materials
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article
A Novel Method for Detecting the Onset and Location of Mechanical Failure by Correlating Engineering Stress with Changes in Magnetic Properties of UNS S32205 Duplex Stainless Steel Using Quantum Well Hall Effect Sensors
Abstract
A new method for determining the onset and location of mechanical failure and the associated engineering stress via scanning the magnetic field distribution using a quantum-well Hall effect sensor is presented. From the Villari effect, it should be noted that changes in the magnetic properties of a ferromagnetic material should reflect some characteristics of the mechanical load and engineering stress that the material sustains. In this study, a direct relationship between the measured magnetic field, engineering proof stress (Rp0.2), and plastic deformation is revealed. The experiment was performed on a Grade 2205 duplex stainless steel under tensile loading. Magnetic field studies closely predicted the proof stress of the sample material. Consequently, the DC magnetic field response predicted the location of the plastic failure as early as 2% of the total strain. This new method has significant potential in systems that require condition monitoring and in-situ non-destructive testing to track the onset of plastic deformation in machine components.