| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Large-scale Metallic Components
|
| Presentation Title |
In Situ Monitoring of Residual Stress during Heat Treatment of High Strength Additively Manufactured Steel via Laser Ultrasound Measurements |
| Author(s) |
Franklyn R. Kellogg, Stephen Cluff, Josh Taggart-Scarff, Brandon McWilliams |
| On-Site Speaker (Planned) |
Franklyn R. Kellogg |
| Abstract Scope |
Residual stress is a problem for laser powder bed fusion additive manufacturing (LPBF AM) that can cause part failure during building or removing the part from the build plate. It can be mitigated through part design or heat treating after building. However, determining proper heat treatments adds extra complexity to the build process. In this study, samples of a high strength steel alloy were made by LPBF AM. Samples were stretched on an Instron at room temperature to induce known levels of strain prior to being held at an elevated temperature for stress relief using a Gleeble 3800. While at temperature, laser ultrasound measurements (LUMET) were used to track changes within the sample during heating. Samples were examined microscopically after heating to determine if changes in the ultrasound signal were caused by microstructural changes, such as grain growth, or due to changes to the stress-strain state within the sample. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, |