| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Equipment, Instrumentation and In-Situ Process Monitoring
|
| Presentation Title |
Laser Powder Bed Fusion of Tall Thin Walled Structures: Dimensional Inaccuracy Due to Local Buckling, and In Situ Infrared Imaging for Early Failure Detection |
| Author(s) |
Syed Zia Uddin, Jack Beuth |
| On-Site Speaker (Planned) |
Syed Zia Uddin |
| Abstract Scope |
Laser powder bed fusion (LPBF) fabrication of tall and thin-walled structures results in large deformation and local buckling causing the parts to violate required geometric tolerances, or even total build failure. We studied the effect of wall thicknesses on the buckling pattern and dimensional accuracy for 50mm tall and 26mm wide 2x2 cell structures with three different wall thicknesses of 200, 300, and 500μm. In addition, in situ process monitoring setup using infrared (IR) imaging and corresponding image processing tools were developed to investigate the preconditions that existed for a successful or a failed build. Three distinct local buckling patterns were observed for the three wall thicknesses and analytics on in situ IR monitoring was presented as an early build failure detection tool. |