| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Marine Materials and Structures
|
| Presentation Title |
Printability and Green Mechanical Properties of Binder jet Additive Manufactured Co-Cr-Mo Parts |
| Author(s) |
Mohsen Moradi, Heidar Karimialavijeh, Elie Bitar-Nehme, Étienne Martin |
| On-Site Speaker (Planned) |
Étienne Martin |
| Abstract Scope |
Cobalt chromium (CoCr) alloys are high-temperature resistant and can be made by laser powder bed fusion for aircraft engines or marine gas turbines. Few studies have explored producing CoCr parts with Binder Jetting technology. This paper optimizes the binder jetting process using gas-atomized Co-Cr-Mo (F75) powder, examining parameters like particle size distribution (PSD), binder saturation, recoating speed, and sintering conditions. Increasing binder saturation significantly enhances green densities and flexural strength. Broader and coarser PSDs improved green densities up to 56% and flexural strength up to 14 MPa. The sintering atmosphere's effect on final density and microstructure was also studied. Samples sintered in vacuum and N2-5%H2 atmospheres achieved the highest densities, up to 97%. Formation and homogenously distribution of nitrides and carbides in N2-5%H2 atmosphere refined grain size to 30 μm. Gas-induced porosity kept densities below 94% in Ar-5%H2 while carbides were mainly at grain boundaries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Mechanical Properties |