About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Microstructural Evolution and TRIP Effect After Austenite Reversion in Laser Powder Bed Fusion Processed Maraging Steels |
| Author(s) |
Jubert Pasco, Clodualdo Aranas Jr. |
| On-Site Speaker (Planned) |
Jubert Pasco |
| Abstract Scope |
Stress-assisted phase transformation in maraging steels remain relatively less explored due to its fully martensitic structure produced via conventional processing routes. However, additive manufacturing leads to significant segregation of austenite stabilizing elements (Mo, Ni, and Ti) along cellular walls, facilitating accelerated austenite reversion through chemical heterogeneity upon aging heat treatment. This work evaluated the effects of extended aging temperatures (490-650 °C) and aging durations (20 mins-15 hrs) on austenite reversion and the consequent ductility improvements attributed to the transformation-induced plasticity (TRIP) effect. Detailed EBSD, APT and TEM analysis was conducted to reveal the parent austenite memory effect within cellular networks that facilitate variant selection, localized texture, and intermetallic precipitation at multiple length scales. The results reveal significant differences in austenite network formation and transformation response to deformation with intermetallic precipitation, offering insights into mechanical enhancement of heat-treated maraging steel fabricated using Laser Powder Bed Fusion (L-PBF). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Phase Transformations, Mechanical Properties |