| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Solid-State Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Applying Additive Manufacturing Itself as a High-throughput Tool to Accelerate Heat Treatment Design of Additively Manufactured Alloys |
| Author(s) |
Yunhao Zhao, Noah Sargent, Kun Li, Wei Xiong |
| On-Site Speaker (Planned) |
Wei Xiong |
| Abstract Scope |
Laser-based additive manufacturing often introduces complex phase transformations in alloys with cyclic heating and cooling processes. Therefore, post-heat treatment often has to be applied to achieve the desired microstructure for improved mechanical performance. This becomes particularly important in the alloys which rely on precipitation strengthening for mechanical strength. In this research, we developed a gradient temperature heat treatment on a bar shape Inconel 718 alloy sample prepared by the laser powder bed fusion. Such a high-throughput experimental concept has been successfully validated through the process-structure-property study using the combined approach of electron microscopy and microhardness. We observed that the precipitation strengthening is predominant for the studied superalloy by laser powder bed fusion, and the grain size variation is insensitive on temperature between 605 and 825 Celsius. This work demonstrated that additive manufacturing itself could be an ideal high-throughput tool for accelerated alloy development and heat treatment optimization. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Phase Transformations |