The investigations of ultrasound Rayleigh wave parameters changing depending on localized plastic strain in AlCu4MgSi alloy and austenitic stainless steel AISI 304 are presented in this paper. Measurements of the ultrasound parameters and localized strain bands motion were carried out in-situ during the tensile tests of the specimens at the constant rate and room temperature. It has been found that the measurement of ultrasound velocity allows detecting the initiation of a localized strain band and its location relative to the acoustic measurement area independently of the deformation mechanism.

Plastic flow localization patterns in bimetal laminates at the macroscale level have been researched. It has been found that plastic deformation proceeds during the whole process of deformation and localized in base, transition and cladding layer of bimetal. Kinetics of proliferation of plastic deformation localization fronts has been traced at different stages of the curve demonstrating plastic flow in A 283 Grade +301 AISI bimetal composed of 301 AISI austenitic stainless steel and A 283 Grade low-carbon steel. Staging of deformation curves has been analyzed.

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