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Title: Microstructure and mechanical properties of Inconel-625 welded joint developed through microwave hybrid heating
Authors: Badiger, R.I.
Narendranath, S.
Srinath, M.S.
Issue Date: 2018
Citation: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2018, Vol.232, 14, pp.2462-2477
Abstract: Application 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.
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