| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
Microstructure, Defect, Mechanical Properties of Binder Jet Printed 17-4 PH Stainless Steel |
| Author(s) |
Meisam Khademitab, Amir Mostafaei |
| On-Site Speaker (Planned) |
Meisam Khademitab |
| Abstract Scope |
Here, we present microstructure and mechanical behavior of binder jet printed and consolidated 17-4 PH stainless steel. Green parts with a relative density of 56±1% are sintered at temperatures between 1200 and 1400 °C, achieving relative densities from 79% to 99%. Microstructural analysis revealed an evolution in phase fractions: at 1200°C, martensite and delta-ferrite were 25% and 75%, respectively, changing to 93% and 7% at 1400°C. Mechanical testing showed a yield and ultimate tensile strength of 875 MPa and 1274 MPa, and elongation up to 5%. Hot isostatic pressing (HIP, 1060 °C at 100 MPa for 4 h) altered mechanical properties in which yield strength and elongation increased to 950 and 10%, while UTS decreased to 1219 MPa. The as-sintered and HIPed samples are subjected to fatigue testing to evaluate the effect of microstructure, defect, and surface condition on fatigue life under low and high cycle fatigue regimes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Iron and Steel |