Electron-beam welding of high-entropy alloy and stainless steel: microstructure and mechanical properties. Issue 16 (9th December 2020)

• Record Type: Journal Article
• Authors: Sokkalingam, R.; Mastanaiah, P.; Muthupandi, V.; Sivaprasad, K.; Prashanth, K. G.
• Is Part Of: Materials and manufacturing processes. Volume 35:Issue 16(2020)
• Page Start: 1885
• Page End: 1894
• Publication Date: 2020-12-09
• Subjects: Al0.1CoCrFeNi -- high -- entropy -- alloy -- processing -- AISI304 -- electron -- beam -- welding -- microstructure -- properties; Manufacturing processes -- Periodicals; Materials -- Periodicals; Manufactured Materials; 670.5
• DOI: 10.1080/10426914.2020.1802045
• Languages: English
• ISSNs: 1042-6914

Abstract

ABSTRACT: An autogenously dissimilar Al0.1 CoCrFeNi-high entropy alloy/stainless steel (i.e., AISI 304) weld joint was produced by an electron-beam welding technique. The weld metal followed mode A of solidification and resulted in a fully austenitic columnar dendritic microstructure due to rapid cooling and lower chromium equivalent to nickel equivalent (Creq /Nieq ) ratio (1.12–1.14). Tensile test sample fractures at the base metal (Al0.1 CoCrFeNi-high entropy alloy) and illustrates higher strength (the yield and ultimate strength of 310 ± 10 MPa and 560 ± 15 MPa, respectively) than that of Al0.1 CoCrFeNi-high entropy alloy, ensuring the suitability of the electron-beam welding for the Al0.1 CoCrFeNi-high entropy alloy/AISI 304 stainless steel joint structures designed with respect to Al0.1 CoCrFeNi-HEA properties. The influence of the manufacturing process (electron beam welding) is highlighted in terms of microstructure and mechanical properties.