TY - JOUR N2 - Nickel alloys, despite their good strength properties at high temperature, are characterized by limited weldability due to their susceptibility to hot cracking. So far, theories describing the causes of hot cracking have focused on the presence of impurities in the form of sulphur and phosphorus. These elements form low-melting eutectic mixtures that cause discontinuities, most frequently along solid solution grain boundaries, under the influence of welding deformations. Progress in metallurgy has effectively reduced the presence of sulphur and phosphorus compounds in the material, however, the phenomenon of hot cracking continues to be the main problem during the welding of nickel-based alloys. It was determined that nickel-based alloys, including Inconel 617, show a tendency towards hot cracking within the high-temperature brittleness range (HTBR). There is no information on any structural changes occurring in the HTBR. Moreover, the literature indicates no correlations between material-related factors connected with structural changes and the amount of energy delivered into the material during welding. This article presents identification of correlations between these factors contributes to the exploration of the mechanism of hot cracking in solid-solution strengthened alloys with an addition of cobalt (e.g. Inconel 617). The article was ended with development of hot cracking model for Ni-Cr-Mo-Co alloys. L1 - http://journals.pan.pl/Content/117810/PDF/AMM-2021-1-30-Konieczna.pdf L2 - http://journals.pan.pl/Content/117810 PY - 2021 IS - No 1 EP - 248 DO - 10.24425/amm.2021.134781 KW - Inconel 617 KW - nickel-based alloys KW - hot cracking KW - high-temperature brittleness range KW - weldability A1 - Adamiec, J. A1 - Konieczna, N. 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. 66 DA - 2020.12.22 T1 - Assessment of the Hot Cracking Susceptibility of the Inconel 617 Nickel-Based Alloy SP - 241 UR - http://journals.pan.pl/dlibra/publication/edition/117810 T2 - Archives of Metallurgy and Materials ER -