| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Microstructure, Defects, and Properties
|
| Presentation Title |
Plastic Deformation Variation Along the Building Direction During Directed Energy Deposition of 316L Stainless Steel |
| Author(s) |
Zhe Cai, Da Guo, Kun Yan, Mark Callaghan, Dominik Daisenberger, Mark Chatterton, Jiadong Chen, Andrew Wisbey, Wajira Mirihanage |
| On-Site Speaker (Planned) |
Zhe Cai |
| Abstract Scope |
Directed Energy Deposition (DED) is used to fabricate components from metal powders. Thermal changes during DED fabrication, results in processed-induced formation of heterogeneous microstructures and subsequent mechanical properties effects, development of residual stresses and plastic deformation. Research has primarily focused on cube-shaped samples, overlooking thinner geometry builds (less than 2.5 mm in thickness) and studies quantifying variations in the level of plastic deformation at different build heights in the deposited layers are limited. In this study, a thin plate was fabricated through DED using 316L stainless steel powders. Synchrotron X-ray diffraction was used to evaluate the development of residual stresses, demonstrating fluctuations along the building direction of the sample. Electron backscattered diffraction was employed to characterise the microstructural development, evaluating changes in plastic deformation levels. A relationship was determined between residual stresses, the levels of plastic deformation and changes in thermal conditions, across different heights of the deposition layers. |