|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||2018 Technical Division Student Poster Competition
||SPU-7: Investigating Damping Performance of Powder Bed Fused Inconel 718 with Unfused Internal Features
||Thaddeus Charles Crowe, Christopher Howard, Ross Cefalu, Onome E. Scott-Emuakpor, Tommy George, Casey Holycross, Bryan Langley, Ryan O'Hara
|On-Site Speaker (Planned)
||Thaddeus Charles Crowe
This study investigates the damping effects of unfused internal features in additively manufactured Inconel 718 beams. This work is motivated by efforts to enhance damping which decreases a part’s vibratory response and consequential applied stress and correlates to a lower likelihood of fatigue failure. Conventional damping techniques include thermally-sprayed ceramic coatings and viscoelastic cores, yet these additive treatments have considerable drawbacks such as altering optimal component geometries. Through the laser powder bed fusion (LPBF) AM process, four unique beam designs are crafted and investigated to quantify the damping effectives of unfused internal features. Forced-response tests are conducted to assess the damping capability of each internal design configuration. These results are compared to the damping performance of a fully fused baseline LPBF beam. With only 1-4% internal beam volume alteration, the four unique beam geometries can provide up to ten times damping into their respective systems compared to the solid beam.