TY - JOUR N2 - The main goal of the article is to identify artificially created defects like lack of fusion and incomplete penetration in butt weld joint using non-destructive volumetric methods. These defects are the most serious defects in welds of steel constructions from the safety point of view. For identification, an ultrasonic phased array technique and a conventional X-ray using digital imaging were used. The theoretical part of the article describes the current state of the given issue and provides basic theoretical knowledge about ultrasonic and X-ray welding tests. In the experimental part, the procedure and results of testing butt weld joint are described by both non-destructive methods. The butt weld joint was made from steel S420MC. Each indication obtained by the ultrasonic and x-ray technique is supplemented by the macrostructure of the weld taken from the indication position. The results of the experimental work mentioned in the article point to the possibility and reliability of the identification of melting defects by selected nondestructive methods in terms of their character and orientation. L1 - http://czasopisma.pan.pl/Content/113031/PDF/AMM-2019-3-50-Konar.pdf L2 - http://czasopisma.pan.pl/Content/113031 PY - 2019 IS - No 3 EP - 1124 DO - 10.24425/amm.2019.129503 KW - internal defects KW - butt weld joint KW - Nondestructive testing KW - lack of fusion KW - incomplete penetration A1 - Koňár, R. A1 - Mičian, M. A1 - Boháčik, M. A1 - Gucwa, M. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 64 DA - 2019.09.03 T1 - Identification of Lack of Fusion and Incomplete Penetration in Butt Weld Joint by Ultrasonic Phased Array Method and X-Ray Method SP - 1117 UR - http://czasopisma.pan.pl/dlibra/publication/edition/113031 T2 - Archives of Metallurgy and Materials ER -