About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
In Situ Monitoring and Post Operando Analysis of Additive Manufactured Dissimilar Alloys: AlSi10Mg and Ti6Al4V |
Author(s) |
Caterina Iantaffi, Yunhui Chen, Maureen Fitzpatrick, Marta Majkut, Bratislav Lukic, Alexander Rack, Kudakwashe Jakata, Martina Meisnar , Thomas Rohr , Eral Bele, Peter D. Lee |
On-Site Speaker (Planned) |
Caterina Iantaffi |
Abstract Scope |
Metal Additive Manufacturing (AM) is an emerging technique that offers unprecedent design flexibility and customizability. Engineered parts comprising bi-metallic and compositionally graded hybrid materials can also be manufactured; however, mismatch in thermo-physical properties and intermetallic phase formation at the interface can lead to poor interfacial bonding and delamination.
In situ synchrotron X-ray observation of directed energy deposition (DED) AM of AlSi10Mg on Ti6Al4V substrate revealed the melt flow dynamics and solidification mechanisms of Al-Ti blending. The results suggest methods of maximising bonding along the interface whilst minimising defects when melting dissimilar alloys. At the interface, Ti aluminide formation by exothermic reaction caused higher heat release increasing diffusion, enhancing the gradual transition from alpha/beta Ti phases to alpha Al matrix. The results elucidate the process-microstructure-properties relationships during additively manufacturing Al-Ti bimetallic structures and help identify improved industrial practice to help avoid the use of intermediate bond layers. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Joining, Aluminum |