Technical Diagnostics and Non-Destructive Testing, 2019, №02



2019 №02 (08)

DOI of Article 10.15407/tdnk2019.02.01

2019 №02 (02)

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Technical Diagnostics and Non-Destructive Testing #2, 2019, pp. 7-12

Assessment of the influence of mechanical properties of structural ferromagnetic materials and their welded joints on the change of parameters of magnetoelastic acoustic emission

Ye.P. Pochapskyi, B.P. Klym, N.P. Melnyk, P.P. Velykyi, P.M. Dolishnii

Karpenko Physico-Mechanical Institute of the NAS of Ukraine, 5 Naukova Str., 79060, Lviv, Ukraine. E-mail: melnyk_natalija@ukr.net

Abstract:
Influence of mechanical properties of structural ferromagnetic materials and their welded joints on the change of informative parameters of magnetoelastic acoustic emission was studied. It was found that presence of applied external loading, residual postweld stresses and different microstructure in welded joint zones causes a change of the sum of amplitudes, duration and form of acoustic signal envelope. Effectiveness of the method and prospects for its application for conducting diagnostics of elements of structures in long-term service in different environments were confirmed. 19 Ref., 10 Fig.
Keywords: ferromagnetic materials, domain wall, remagnetization field, magnetoelastic acoustic emission, signal information parameters, welded joint, weld, heat-affected zone, base metal, residual stresses

Received: 27.02.2019
Published: 14.05.2019

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