| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Corrosion Fatigue Response of Laser Powder Bed Fused High Strength Steel |
| Author(s) |
Sheng Huang, Abhi Ratna Sharda, Cemal Cem Tasan |
| On-Site Speaker (Planned) |
Sheng Huang |
| Abstract Scope |
The unique thermal history of the Laser Powder Bed Fusion (LPBF) process often leads to high-strength steel with a primary dendritic microstructure due to solute partitioning, which retains its signature even after stress relief and heat treatment. Given the different responses of previously interdendritic and dendritic regions to corrosion, we found that this results in distinct corrosion fatigue crack growth characteristics, in contrast to the same alloy with a conventionally produced microstructure. In response, using interrupted and in-situ apparatus, and with the help of Kelvin probe force microscopy, we established a mechanistic description of the crack growth behavior unique to LPBF-induced microstructures. The implications of this, with regards to conventionally obtained microstructures, will be discussed. Additionally, the broader implications for the rapidly growing interest in additively manufactured components in the tooling industry and the consideration of corrosion fatigue-microstructure interaction for prolonging tool life will be detailed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Mechanical Properties |