| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-100: Effect of Thermal History on Elastic Strain and Microstructural Evolution in Additive Manufacturing |
| Author(s) |
Kathryn Small, Michael Groeber, Mitra L Taheri |
| On-Site Speaker (Planned) |
Kathryn Small |
| Abstract Scope |
Direct metal laser sintering (DMLS) is a thermally complex fabrication process which induces anisotropic microstructures in final components. The prediction of material properties in additively manufactured parts is difficult due to our lack of understanding of the microstructural evolution during additive processes. Mechanisms of the evolution may be observed using GND density and elastic strain characterization with accompanying thermal history data; however, the remelting and heat affected zone present during the laser tracking process makes thermal modelling of the DMLS process difficult. A single-track sample is used to simplify the thermal model of the DMLS part being analyzed in this study, enabling connection between microstructural features analyzed by electron backscatter diffraction (EBSD) and the thermal history of Inconel 625 fabricated by DMLS. Elastic strain concentrations and dislocation structures are observed throughout the length of the sample, allowing observation of rapid solidification present during a single laser track during DMLS. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |