Diffusion brazing of Inconel 617 and 321 stainless steel by using AMS 4772 Ag interlayer. (January 2021)

• Record Type: Journal Article
• Authors: Paidar, M.; Ashraff Ali, K.S.; Ojo, O.O.; Mohanavel, V.; Vairamuthu, J.; Ravichandran, M.
• Is Part Of: Journal of manufacturing processes. Volume 61(2021)
• Page Start: 383
• Page End: 395
• Publication Date: 2021-01
• Subjects: Diffusion brazing -- Inconel 617 -- AISI 321 stainless steel -- Ag interlayer -- Microstructure -- Shear strength -- Fracture; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2020.11.013
• Languages: English
• ISSNs: 1526-6125

Abstract

Abstract: The diffusion brazing of Inconel 617 and AISI 321 stainless steel was carried out with a 50 μm thick AMS 4772 Ag interlayer at a constant brazing temperature of 750 °C under a variable holding time (30 & 60 min). The microstructure of the diffusion-brazed joints was studied in detail via the use of a scanning electron microscope and energy dispersive spectroscopy. The shear strength and fracture behavior of the joints were investigated. Void-free diffusion-brazed joints were obtained due to the capillarity effect of Ag and a more uniform reaction layer was obtained in the joint with a higher brazing/holding time. The joint with a prolonged brazing time of 60 min has the maximum shear strength of 322.9 MPa and an improvement of 26 % over the joint processed at 30 min. The predominant brittle (fracture) failure in the sample processed at 30 min brazing/holding time was responsible for its weak shear strength. At effective brazing/holding time, the use of the AMS4772 Ag interlayer has been effective in joining the IN617 and AISI 321 SS alloys.