Abstract
ABSTRACT Dissimilar junctions between the zirconium alloy (Zy-4) and 304L stainless steel (SS) are prepared via two bonding processes: solid-phase diffusion at T1 = 1223 K and in transient liquid phase (TLP) at T2 = 1293 K and T3 = 1323 K for an identical isothermal hold time of 2700 s. The formed layers and phases at the interface were characterised by the combination of EDS-EBSD-ESEM, EPMA and X-RD and impact fracturing tests. The Zy-4/SS interface is formed of three layers containing Cr-rich α-Fe and Zr(Fe,Cr)2 and Zr2(Fe,Ni) intermetallic compounds. We establish the relationship between the interface microstructures and hot cracking formation which are of thermo-mechanical and solidification origin. The knowledge of the solidification path of the TLP obtained in LIII layer at T2 and T3 makes it possible to explain the formation of micro-pores. The fracture is for both bonding processes, takes place in the brittle mode, of the intergranular type by cleavage and is in the LIII layer of the junction.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
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.