%0 Journal Article %T Crack Visualization and Dimensioning by Shadow Method at Refining Ultrasonic Inspection %A Markov, A.A. %A Mosyagin, V.V. %K ultrasonic flaw detection, rail head, size measurements of cracking, through sonic test, shadow method %J NDT World %D 2020 %N 23 %P 2 %I LLC SVEN