| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
Effect of Heat Input on Low Cycle Fatigue (LCF) on Alloy 625 Manufactured by Gas Metal Arc Directed Energy Deposition (GMA-DED) |
| Author(s) |
Sukalpan Nandi, Shivam Kumar, Atanu Das, Manivannan Raja, Himadri Nandan Bar, Rajinikanth V. |
| On-Site Speaker (Planned) |
Sukalpan Nandi |
| Abstract Scope |
Components manufactured using alloy 625 like aero-engine exhaust systems, turbine shrouds, compressor vanes and thrust reverser systems are designed for high operating temperature (500-760ᴼC) at high alternating stresses and often fail by low cycle fatigue (LCF). Thus, investigation of LCF behavior is an important aspect to be considered when such components are designed. Gas metal arc directed energy deposition (GMA-DED) with its high deposition rate and cost effectiveness is preferred for large components with medium to low complexity over Selective Laser Melting process. Heat input is an important process parameter in GMA-DED that determines the cooling rate and consequently, the final microstructure. In this work, LCF behavior is studied on Alloy 625 prepared at two heat inputs (330.5 J/mm and 734.4 J/mm). Additionally, a physics-based material model is used to predict the mechanical deformation behavior by considering various strengthening mechanisms such as grain boundary strengthening, precipitation strengthening and solid-solution strengthening. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Mechanical Properties |