National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
Barkhausen noise testing of surface decarburization of steel
Stupakov, Oleksandr ; Tomáš, Ivan ; Skrbek, L.
Magnetic Barkhausen noise technique was tested for applicability of non-destructive charaterization of the decarburized layer depth. A newly introduced parameter, Barkhausen noise coercivity, was proposed for practical use due to its sensitivity to the tested decarburization and its stability to the measurement conditions.
Optimizované magnetické testování feromagnetických konstrukčních materiálů
Tomáš, Ivan ; Kadlecová, Jana ; Stupakov, Oleksandr ; Skrbek, B.
An example of application of Magnetic Adaptive Testing method on cast iron samples is presented. The method is shown to utilize magnetic hysteresis measurement, but shifts the focus towards multi-parametric analysis, achieving at the same time higher sensitivity and requiring lower magnetization of the samples than the traditional measurement.
Ultrasound and electromagnetic rapid tests of modification effect spheroidal or vermicular graphite cast irons manufacturing
Skrbek, B. ; Nosek, V. ; Tomáš, Ivan ; Stupakov, Oleksandr
Measurement of speed of sound in a wedge samople immediately after the eutectic reaction is finished. Measurement of electric resistance of a ring sample during the eutectic reaction. Outlook for magnetic tests.

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