| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
|
| Presentation Title |
The Tensile Behavior of Additively Manufactured 17-4 PH Stainless Steel with Different Heat Treatments |
| Author(s) |
Saadi A. Habib, Steven P. Mates, Mark R. Stoudt, Fan Zhang, Olaf Borkiewicz |
| On-Site Speaker (Planned) |
Saadi A. Habib |
| Abstract Scope |
Additive manufacturing (AM) of 17-4 PH martensitic stainless steel is of interest for its high strength and corrosion resistance for many engineering applications. However, as-printed AM 17 4 PH exhibits high residual stresses, a complex, heterogenous microstructure, and often unfavorable mechanical properties, particularly when processed in a nitrogen environment. Therefore, in this work, we investigate the influence of homogenization and aging heat-treatments on the tensile behavior of AM 17 4 PH. These heat treatments are designed to vary the strength, work hardening, and ductility by varying the amount of metastable austenite in the microstructure, which transforms to martensite during deformation. Electron microscopy and high-energy x ray diffraction (HEXRD) are used to quantify the microstructure for each heat treatment. Ex-situ HEXRD measurements are also used to quantify the austenite to martensite transformation as a function of strain. Finally, the fracture surfaces are analyzed to help explain the ductile fracture mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Phase Transformations, Mechanical Properties |