| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Metal Dusting of Additively Manufactured Ni-Cu Alloys |
| Author(s) |
Beyza Öztürk, Emma White, Clara Schlereth, Till König, Jan-Philipp Roth, Anke Silvia Ulrich, Katrin Jahns, Mathias C. Galetz |
| On-Site Speaker (Planned) |
Mathias C. Galetz |
| Abstract Scope |
In the energy and petrochemical industries, carbonaceous gases lead to metal dusting between 400 and 800°C, which involves carbon ingress and graphite nucleation, ultimately causing pit formation and component failure. Monel®, an alloy of Ni and Cu, offers the opportunity to inhibit the attack catalytically, which was shown to work very effectively for Sn and Cu. While wrought Monel® behaved poorly in metal dusting atmospheres due to Mn and Fe traces, additively manufactured (AM) Monel® showed lower attack. AM also offers chemistry adjustments via microalloying or combining post-processing with a coating step to apply oxide formers. Different AM-printed Ni-Cu compositions and a Cr diffusion coating were exposed at 550°C and 19 bar for up to 500 hours in an aggressive metal dusting atmosphere. Microstructural changes and attack mechanisms were compared for coated and uncoated materials, with increased Al additions or Cr coatings demonstrating significantly improved resistance against metal dusting. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Surface Modification and Coatings, Additive Manufacturing |