| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
2023 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-31 Laser-Powder Bed Fusion of Ti-6Al-2Sn-4Zr-2Mo-0.08Si (Ti-6242): As-built Properties, Kinetics of α to β Phase Transformation, and Design of Heat Treatment |
| Author(s) |
Harish Chandra Kaushik, Mahdi Habibnejad Korayem, Amir Hadadzadeh |
| On-Site Speaker (Planned) |
Harish Chandra Kaushik |
| Abstract Scope |
Ti-6242 is a near-α high-temperature titanium alloy. As a near-α alloy, the evolution of the β phase with different volume fractions and morphologies will affect the strength and ductility. On the other hand, laser powder bed fusion (L-PBF) has enabled the fabrication of metals with ultrafine, metastable, and hierarchical microstructures. Such microstructures contribute to strength and ductility through distinct mechanisms at different length scales. In this study, Ti-6242 is fabricated using L-PBF with different energy densities. The kinetics of α to β phase transformation in the L-PBF samples is then studied using differential scanning calorimetry (DSC). The kinetics results are used to design a two-step heat treatment to enhance the ductility at minimal strength loss, through the evolution of the β phase with various volume fractions and morphologies. The microstructure is studied using multi-scale techniques including OM, SEM, EBSD, and TEM to elaborate on the mechanisms of strengthening and toughening. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, Phase Transformations, Mechanical Properties |