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- W157115576 abstract "Extensive microstructural modifications occur during laser and electron beam welding of various alloys. For austenitic stainless steels, most welds that do not hot crack contain a duplex austenite plus ferrite microstructure when welded by conventional welding processes. However, during laser welding at high speeds, fully austenitic or ferritic microstructures can be obtained in this class of material. The observed modifications in microstructures will be explained in terms of changes in the mode of solidification and also a retardation of solid state transformation. Laser and electron beam welding processes have been successfully used to weld iridium alloys, which are difficult to weld by conventional welding processes. During welding, these alloys have been found to be prone to severe hot cracking. The cracking is influenced to a great extent by the fusion zone microstructure and composition. The successful laser and electron beam welding of these alloys is attributable to the highly concentrated heat source available, precise control of the heat input, and the refinement in fusion-zone microstructure obtained. The refinement in the fusion-zone microstructure and hence the reduction in hot-cracking tendency of these alloys are discussed in terms of the puddle shapes and grain growth during laser or electron beam welding." @default.
- W157115576 created "2016-06-24" @default.
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- W157115576 date "1986-01-01" @default.
- W157115576 modified "2023-09-27" @default.
- W157115576 title "Microstructural modifications during laser and electron beam welding" @default.
- W157115576 hasPublicationYear "1986" @default.
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