About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Stress Corrosion Cracking Growth Rates in Additively Manufactured Laser-Powder Bed
Fusion Alloy 625 |
| Author(s) |
Ainsley Pinkowitz |
| On-Site Speaker (Planned) |
Ainsley Pinkowitz |
| Abstract Scope |
For components with metals which were originally selected for stress corrosion cracking (SCC) resistance, AM replacements will need to display equal or slower SCC growth rates to the traditional wrought equivalent. Testing was performed in this work to observe the susceptibility of Alloy 625 fabricated by laser-powder bed fusion (L-PBF) to SCC in deaerated pure water conditions at temperatures of 480 – 662°F (250 – 350°C). Testing was performed in active load facilities running multi-phase, multi-condition compact tension specimens. Results indicate consistent crack growth rates across a variety of powder lots and recrystallizing heat treatments. A clear orientation dependence was observed, wherein specimens with cold rolling direction aligned to the crack propagation experienced faster growth rates than those cold rolled to the same reduction in a perpendicular direction. The overall performance of all L-PBF Alloy 625 tested indicated an improvement over expected wrought Alloy 600. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Powder Materials, Copper / Nickel / Cobalt |