Surface integrity in material removal processes: Recent advances

Monitoring of grinding burn via Barkhausen noise emission in case-hardened steel in large-bearing production

The nondestructive Magnetic Barkhausen Noise (MBN) technique was applied for the evaluation of SAE 4140 and SAE 6150 steels after a Jominy end-quench test. Microstructures were also characterized by SEM (Scanning Electron Microscope) and hardness tests. MBN measurements were performed on the same sample regions at three excitation frequencies. Different parameters of the measured signals (signal peak position and height, and Root mean square) were calculated. A relationship between mechanical hardness and MBN parameters was found for both materials, with the best correlation coefficient being found in low excitation frequency range.

Relation Between Magnetic Barkhausen Noise and Hardness for Jominy Quench Tests in SAE 4140 and 6150 Steels

https://eprints.ncl.ac.uk/file_store/production/195564/E327FF61-42C6-4C1B-9CEA-094391E31805.pdf

Influence of applied magnetic field strength and frequency response of pick-up coil on the magnetic barkhausen noise profile

Non-destructive monitoring of corrosion extent in steel rope wires via Barkhausen noise emission

https://eprints.ncl.ac.uk/file_store/production/56348/7EC4261F-5A2D-4799-8B45-45F6ECE70041.pdf

P. Mountford

Papers

Magnetic Barkhausen emission technique for evaluation of residual stress alteration by grinding in case-carburised En36 steel