| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Using Laser Ultrasonics to Measure Localized Changes in Young’s Modulus caused by Select Laser Flash Sintering |
| Author(s) |
Christina L. Nissen, Joseph J. Beaman, Desiderio Kovar |
| On-Site Speaker (Planned) |
Christina L. Nissen |
| Abstract Scope |
Select laser flash sintering (SLFS) is a process that requires the onset of initial stage sintering without proceeding to intermediate stage sintering. Because there is minimal change in density at this stage, traditional non-destructive techniques for determining the onset of sintering cannot be employed. In this study we use model experiments that show that changes in the Young’s modulus are strongly correlated to different levels of early-stage sintering. We then study time of flight measurements made with a laser ultrasonic system on samples that have been scanned with an SLFS laser. We show that this technique can differentiate between unsintered and partially sintered regions, even in the earliest stages of sintering. The use of laser ultrasonics to detect the onset of sintering has applications for SLFS and other powder-bed additive manufacturing processes. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |