Identification of internal defects of hardfacing coatings in regeneration of machine partsJerzy Józwik, Krzysztof Dziedzic, Mykhalo Pashechko and Andrzej ŁukasiewiczE3S Web Conf., 19 (2017) 03025DOI: https://doi.org/10.1051/e3sconf/20171903025