from the conferences organized by TANGER Ltd.
The nickel-based superalloy ZhS32, which has a cast directional structure, is ideal for use in the aviation industry and can withstand operating temperatures of 950–1050 °C. The successful practical application of the microplasma powder welding deposition (MPWD) process using the ZhS32 Ni-based superalloy on aircraft blades has been confirmed at the E.O. Paton Electric Welding Institute. The thermal deformation parameters of crystallization in the deposition process differ greatly from the parameters of directional crystallization in the manufacture of the base metal blades; therefore, the specified structures of deposited metal are investigated, taking into account the tendency towards a low-plastic state or hot cracking in certain manufacturing parameters. This study examined the structural states of the ZhS32 alloy after deposition ('as-built') and after follow heat treatments that are usually applied to directionally crystalized ZhS32. A set of short-term strength mechanical tests was performed on the same samples. These consisted of critical fracture strain (εcr) and tensile strength as a function of temperature, as determined by the original method using longitudinal static tensile testing within a temperature range of 20–1100 °C. These dependencies were investigated using discrete simulations to determine the tensile strength of the deposited metal in response to the welding thermal deformation cycle.
Keywords: Nickel-based superalloy, mechanical properties, deposited metal, microstructure, heat treatment© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.