About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
|
Materials
|
Presentation Title |
Analysis of Residual Stress Reduction of in situ Annealed LPBF 316L Stainless Steel |
Author(s) |
William L. Smith, William L. Smith, John D. Roehling, Bey K. Vrancken, Maria Strantza, Ava S. Ashby, Rishi Ganeriwala , Bjorn Clausen, Gabriel M. Guss, Joseph T. McKeown, Michael R. Hill, Manyalibo J. Matthews |
On-Site Speaker (Planned) |
William L. Smith |
Abstract Scope |
High residual stresses are typical within parts built using laser powder bed fusion (LPBF), which is due to the rapid heating and cooling cycles inherent to the process. Such high stresses can lead to warping and potential deviation from original design specifications. With the growing interest in metal 3D printing within commercial industries it is imperative that methods of efficient residual stress reduction are found. In this work, an in situ method of reducing residual stress during LPBF is explored. By selectively illuminating the print surface with homogenously intense light from an array of laser diodes, we directly apply a heat source to the print surface and control the thermal history of the part. We study the effects of temperature history on the residual stress state in stainless steel 316L parts made using LPBF. Prepared by LLNL under Contract DE-AC52-07NA27344. LLNL-ABS-808072 |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |