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Munster Technological University
Mechanical engineering | Ferromagnetism | Metals -- Mechanical properties | Metals -- Microstructure
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Magneto-Acoustic Emission Analysis Of Microstructural Change In Aisi 430 And Aisi 304 Stainless Steel, Denis O'Sullivan
Magneto-Acoustic Emission Analysis Of Microstructural Change In Aisi 430 And Aisi 304 Stainless Steel, Denis O'Sullivan
Theses
Magneto-acoustic emission (MAE) is a relatively new non-destructive detection technique. Its working principle is based on Barkhausen discontinuities and magnetostriction within a ferromagnetic material that is subjected to a varying magnetic field. Magneto-acoustic emission (MAE) and magnetic Barkhausen noise (MBN) sensing techniques were developed and employed to characterise plastically deformed and heat-treated AISI 430 ferritic stainless steel and AISI 304 austenitic stainless steel samples. A new waveform measurement parameter for magneto-acoustic emission was developed called MAE (Absolute “energy”).
Both MAE and MBN were found to decrease with increasing plastic deformation of AISI 430. MAE (Absolute “energy”) and MBN (RMS) were …