Abstract
In this paper, the microstructure and mechanical properties of dissimilar welding of AISI 304 L austenitic stainless steel and UNS C70600 copper-nickel alloy have been investigated. For this purpose, Tungsten-Gas Arc welding method with both pulse and non-pulse currenst and ERNiCr-3 welding wire was applied. The microstructures of different regions were evaluated using optical microscope and scanning electron microscope. The result showed that ERNiCr-3 filler metal has fully austenitic microstructure in both pulse and non-pulse modes, but in pulse mode, dendrites were found to be smaller than non-pulse mode. In both interfaces, between base and weld metal, partially melting zone was illustrated. Increasing grain size was more intense in the HAZ region of the copper-nickel base metal. In the tensile test, all samples were ruptured from the HAZ region of copper-nickel alloy with ductile fracture mode. According to the result of tensile test, tensile strength of the welded sample in pulse and non-pulse modes was 235 MPa and 268 MPa, respectively. The results of the hardness test showed that the hardness of the weld region in the pulse mode (75.3HRB) was slightly higher than hardness in non-pulse mode (71.6HBR). Minimum hardness number (17HRB) was related to the UNS C70600 alloy.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
