Abstract
The structure of the different zones of a C02 laser welded joint between a chromium-nickel steel sheet and a titanium alloy sheet, with a copper insert between them, is studied by EBSD analysis. The phase compositions of all the zones have been determined. The weld material has been found to consist of a Cu-based solid solution and unevenly distributed intermetallic particles of different stoichiometric compositions. The heat-affected zones consist of supersaturated iron- and titanium-based solid solutions. After laser welding, the microdeformations of the phase lattices are distributed unevenly over the cross section of the welded joint; namely, the maximum microdeformations and the resulting microstresses are concentrated in the heat-affected zone at the boundary between the weld and the titanium alloy.
Highlights
The application of the electron backscatter diffraction (EBSD) technique to analyzing the structural state of materials is becoming increasingly popular
The aim of this study is to investigate the structural state of the different zones of a laser-welded joint between a chromium-nickel steel and a titanium alloy with an intermediate copper insert
Materials and research methods We studied a weld produced by laser welding of 3 mm thick sheets of the 12Kh18N10T chromiumnickel steel and the VT1-0 titanium alloy with an intermediate copper insert (99.9 wt% Сu)
Summary
The application of the EBSD technique to analyzing the structural state of materials is becoming increasingly popular. It is promising to use recrystallization and stress maps, as well as the analysis of the textures of the zones of welded joints produced by high-energy radiation sources, e.g. laser and electron-beam ones [1, 2]. When these heat sources are used, high solidification rates, together with convective mixing of the melt in the weld pool, may cause the formation of significant residual stresses and microstrains in welds, if dissimilar materials are to be joined, when heterophase structures are formed.
Sign-in/Register to view highlights & summary 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 callMore From: IOP Conference Series: Materials Science and Engineering
Disclaimer: 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.
