Evaluation of electron beam welded AISI 415 stainless steel

DOIResolve DOI: http://doi.org/10.1115/IMECE2014-39317
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Proceedings titleASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
ConferenceASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014, 14 November 2014 through 20 November 2014
Article number39317
SubjectElectron beam welding; Electron beams; Gages; Heat affected zone; Hydroelectric power; Martensitic stainless steel; Microhardness; Turbines; Turbomachine blades; Welding; High energy densities; Hydro-power generation; Microhardness evolutions; Sustainable manufacturing; Thick gauge section; Vacuum electron beam welding; Stainless steel
AbstractSustainable manufacturing for assembly of turbines used in hydro power generation systems is driving the development of advanced technologies targeted to reduce life-cycle costs whilst assuring high performance over the prolonged product life-span. The turbine runner, a critical component in hydro power generation systems, requires weld assembly between the crown, band and blade sub-components. With due consideration of the thick-gauge sections involved, design and fabrication of a turbine runner that would integrate a high energy density technology for assembly, such as vacuum electron beam welding (EBW), has marked potential to achieve deep penetration with a low heat input, thereby rendering a weldment with narrow heataffected zones (HAZ) and low distortion. In this study, the weldability of thick-gauge section AISI 415 martensitic stainless steels that are widely utilized in hydro turbine manufacturing was investigated by EBW. Particularly, bead-on-plate (BOP) welding of 88 mm-thick AISI 415 plate was carried out using a 42 kW high vacuum EBW system. The characteristics of the weldments, such as fusion zone (FZ) and HAZ microstructures and hardness were evaluated. The microstructural constituents across the weldment for process conditions that rendered nearcomplete penetration were studied and related to the microhardness evolution.
Publication date
PublisherAmerican Society of Mechanical Engineers
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace
Peer reviewedYes
NPARC number21275471
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Record identifier49361988-652a-4c5d-936c-2e5db381d81f
Record created2015-07-14
Record modified2016-05-09
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