| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Innovative Process Design and Processing for Advanced Structural Materials
|
| Presentation Title |
Co-design of 3D Printing, Parts and Microstructure |
| Author(s) |
Anthony D. Rollett, Nicholas Lamprinakos, Junwon Seo, Srujana Yarasi |
| On-Site Speaker (Planned) |
Anthony D. Rollett |
| Abstract Scope |
We illustrate the importance of co-design with the example of high temperature heat exchangers that employ a pin-and-plate structure and integral headers. 3D printing complex geometries entails mostly empirical adjustments to, e.g., pin geometry and avoidance of sharp changes in cross-section. Concurrently, optimal print conditions must be identified for each printer that minimize porosity. Qualification involves predicting the process window from the physics of laser powder bed fusion and then printing test parts to measure porosity as a function of power, speed, hatch spacing and other variables. Characterization of single track melt lines is crucial for calibrating the absorptivity, for example. The resulting mechanical properties in both Haynes 230 and 282 are comparable to standard product despite having not yet optimized grain structure. Lessons about microstructure learned from simulation point to strategies for optimization. |