Badiger, R.I.Narendranath, S.Srinath, M.S.2026-02-052018Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2018, 232, 14, pp. 2462-24779544054https://doi.org/10.1177/0954405417697350https://idr.nitk.ac.in/handle/123456789/24915Application of microwave energy for processing of bulk metals is effectively utilized to join Inconel-625 plates through hybrid heating technique using Inconel-625 powder as an interface filler material. Post welding characterization of microwave developed joints through X-ray diffraction shows the development of carbides of niobium and chromium as well as intermetallic phases along with the primary ?-phase face-centered cubic matrix. Microstructural examination reveals the formation of Laves phase along the grain boundaries in the fusion zone. Microwave-induced joints exhibit average microhardness of 245 ± 20 HV and 0.7% porosity in the fusion zone. Average ultimate tensile strength and flexural strength of the developed joints were estimated at 375 and 377 MPa respectively. Average impact toughness of microwave-induced joints is observed to be 18 J. © IMechE 2017.CarbidesFiller metalsFracture toughnessGamma raysGrain boundariesMicrowavesTensile strengthWeldingX ray diffractionFace-centered cubicFlexural testsInconelIntermetallic phasisMicrostructural examinationMicrostructure and mechanical propertiesSusceptorsUltimate tensile strengthMicrowave materials processing