Abstract
Results of studies on the influence of microstress on the parameters of electromagneticacoustic transduction (EMAT) in thermally treated and cold-worked steels are presented. It is shown that in thermally treated steels, except high-alloy corrosion-resistant austenite-martensite steel 1Kh15N5AM3Sh, the amplitude of the EMAT signal decreases linearly with an increase in the microstress. In this situation, the propagation velocity of normal elastic waves also decreases monotonously; this is also the case for 1Kh15N5AM3Sh steel. In pearlitic steel that is cold-worked by drawing, the dependences of the EMAT amplitude and the propagation velocity are linear only at the initial stage of deformation. After that, the parameters of the EMAT are affected most strongly by the phenomena that occur during the drawing: the turning of ferrite and carbide plates and the decrease in the dispersion angle of the axial crystallographic structure.
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Translated from Defektoskopiya, Vol. 40, No. 7, 2004, pp. 26–33.
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Gorkunov, E.S., Zadvorkin, S.M. & Solomein, M.N. Utilization of electromagnetic acoustic conversion to estimate microstress in steels. Russ J Nondestruct Test 40, 449–454 (2004). https://doi.org/10.1007/s11181-005-0003-2
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DOI: https://doi.org/10.1007/s11181-005-0003-2