| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing: Alloy Design to Develop New Feedstock Materials
|
| Presentation Title |
Residual Stress Mitigation of Additive Manufactured Stainless Steel 316L Components through the Directed Energy Deposition Inclusion of TiC Nanoparticles |
| Author(s) |
Jakob D. Hamilton, Samantha Sorondo, Andrew Greeley, Denis Cormier, Iris V. Rivero |
| On-Site Speaker (Planned) |
Jakob D. Hamilton |
| Abstract Scope |
Directional solidification in directed energy deposition (DED) additive manufacturing (AM) often leads to detrimental residual stresses (RS) and thermal distortion in as-fabricated components. Residual stresses exacerbate cyclic loading and reduce the fatigue life of DED components. Recent efforts to mitigate residual stresses in DED include altering deposition parameters and inclusion of ceramic reinforcements. These particles act as nucleation sites and disrupt columnar grain growth from rapid material solidification. This work explores how the inclusion of TiC nanoparticles in the build of stainless steel 316L AM components affects RS distribution. Nondestructive residual stress measurement through x-ray diffraction yielded that components possessing TiC nanoparticles exhibited compressive residual stresses near TiC agglomerates. Likewise, the TiC distribution was found to depend on DED parameters, thus providing a method to affect residual stress patterns in AM metal composite components. This work quantifies modification of residual stresses in AM through the direct inclusion of TiC nanoparticles. |