About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Corrosion Performance on Budget: Achieving LPBF benchmark in Scalable WAAM IN625 via Strategic Heat Treatment |
| Author(s) |
Toushiqul Islam, Jonah Klemm-Toole, Shuaihang Pan |
| On-Site Speaker (Planned) |
Toushiqul Islam |
| Abstract Scope |
Deciphering process-microstructure-corrosion linkages in additively manufactured (AM) IN625 is critical for harsh environments like marine and nuclear applications, where scalability is paramount. This study compares corrosion performance of laser powder bed fusion (LPBF) and wire arc additive manufacturing (WAAM) IN625. As-built LPBF exhibits superior resistance due to refined grains and uniform element distribution. WAAM shows variability and accelerated galvanic corrosion linked to Nb/Mo segregation and deleterious Ti-core shell Laves phases. Strategic heat treatments dissolve these phases, enhance passivation film protection, and levels WAAM's corrosion resistance to LPBF benchmarks, while maintaining superior scalability and lower costs than LPBF. This work narrows the corrosion performance gap, enabling WAAM as a cost-effective, scalable alternative for large-scale IN625 applications when microstructurally optimized via targeted heat treatment. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Environmental Effects |