| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
Influence of Solidification Parameters on the Microstructure of Inconel 625 Processed by Direct Energy Deposition |
| Author(s) |
Vijay shankar Sridharan, Siwei Du, Shubham Chandra, Varun Chaudhary, Dong Zhili |
| On-Site Speaker (Planned) |
Vijay shankar Sridharan |
| Abstract Scope |
In recent years, sustainable manufacturing has placed significant emphasis on extending the life cycle of components through localized repair. Laser direct energy deposition (LDED) is a promising additive manufacturing technique that enables the rapid production and repair of complex metallic parts. However, a major challenge with LDED-prepared components is the heterogeneous microstructure caused by temperature gradients and solidification rates. Our research focuses on demonstrating the use of pre-heating to control the microstructure morphology of LDED-processed components. The substrate temperature greatly affects the solidification parameters, leading to significant changes in the as-built microstructures. By optimizing the pre-heating temperature, we have successfully established the desired microstructure gradient. Our findings show that pre-heating resulted in uniform directional columnar grain growth with finer grains at the interface and larger, coarser grains in the deposition. Optimized pre-heating also yielded a finer columnar grain structure compared to typical printing strategies. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |