A Microstructural Analysis Of The Bonding Layer In The Manufacturing Of Co Alloy | Ti Alloy Bimetallic Components By Directed Energy Deposition

Authors:

Lucia De Bortoli (University of Trento, Italy),
Sasan Amirabdollahian (University of Trento, Italy),
Stefano Rappo (Lincotek Medical, Italy),
Matteo Perini (ProM facility, Trentino Sviluppo, Italy),
Alberto Fabrizi (University of Padova, Italy),
Alberto Molinari (University of Trento, Italy)

Abstract:

In the production of Co alloy | Ti alloy bimetallic components by Laser Directed Energy Deposition (L-DED), one critical issue is the microstructure of the metallurgical bonding layer produced by the melting of the substrate. This layer has a complex microstructure resulting from the mixing of the two alloys in liquid state and solidification. To investigate such a microstructure, specimens with a different content of the two alloys were produced by SPS and melted by laser, with the working parameters typical of the L-DED process. The solidified microstructure is quite complex. The SEM-EDXS and EBDS analyses show the partitioning of Ti, Co and the alloying elements in different compounds and phases depending on the relative amount of the two alloys. The tendency to cracking shows a dependence on the microstructure.

DOI:

https://doi.org/10.59499/WP225371926