| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing: Alloy Design to Develop New Feedstock Materials
|
| Presentation Title |
Micro-crack Mitigation by Alloy Modification in the Additively Manufactured Ni-base Superalloy CM247LC |
| Author(s) |
Christian Leinenbach, Seth Griffiths, Hossein G Tabasi, Toni Ivas, Xavier Maeder, Anthony De Luca, Kai Zweiacker, Rafal Wrobel, Jamasp Jhabvala, Roland E Logé |
| On-Site Speaker (Planned) |
Christian Leinenbach |
| Abstract Scope |
Additive Manufacturing (AM) of Nickel-base superalloys has the potential to create complex monolithic structures that can lead to performance and cost improvements in structures for high temperature environments. However, the rapid melting and solidification inherent to AM often results in micro-cracking. Samples were fabricated with CM247LC powder on two separate commercial SLM machines. Extensive SEM and TEM analysis was performed on the as fabricated samples to better understand microstructure, segregation, and defect formation. A combination of experimental data and thermodynamic simulations were utilized to develop a new variant of CM247LC with the goal to mitigate crack formation. The new alloy was processed with two commercial SLM machines and extensive microstructure characterization was performed. Other micro-crack mitigation strategies will be discussed. |