| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Solid-State Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Controlled Thermal Post-processing of Additively Manufactured Ti-6Al-4V Parts in Order to Enhance their Mechanical Performance |
| Author(s) |
Frederico Rossi Kaschel, Rajani K. Vijayaraghavan, Patrick McNally, Mert Celikin, Denis P. Dowling |
| On-Site Speaker (Planned) |
Frederico Rossi Kaschel |
| Abstract Scope |
Parts fabricated by additive manufacturing often require post-thermal heat treatments, in order to reduce internal stresses, as well as to increase their density, yielding both enhanced microstructural properties and mechanical performance. In this study the impact of heat treatments of AM printed Ti-6Al-4V, on the alloy’s internal residual stress, on phase fraction and resultant mechanical properties, are systematically examined. Preliminary in-situ X-Ray Diffraction (XRD) analysis showed that stress relaxation occurs on heating between room temperature and 400°C, without any evidence of phase transformation. Tensile test results on samples annealed at different temperatures, were found to directly correlate with changes in phase fraction, as observed using in-situ XRD analysis. In addition, this investigation provides a further insight on the effect of varying input energy along with processing time during heat treatments, on both the microstructural and mechanical performance of the thermally annealed parts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Phase Transformations, Mechanical Properties |