| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
2024 Institute of Metals Lecture/Robert Franklin Mehl Award: Optimization of Microstructure of Titanium Alloys Processed Using Additive Manufacturing |
| Author(s) |
Mohan Nartu, Brian Welk, Srinivas Mantri, Nevin Taylor, Gopal Viswanathan, Rajarshi Banerjee, Narendra Dahotre, Hamish L. Fraser |
| On-Site Speaker (Planned) |
Hamish L. Fraser |
| Abstract Scope |
When processing Ti alloys using additive manufacturing, the resulting microstructure often exhibits coarse columnar grains (in the direction of deposition) with attendant deficits in properties. The solution adopted involved the application of computational thermodynamics to identify which alloying additions to titanium alloys result in an increase in the freezing range of the given alloy base, such that a columnar to equiaxed transition (CET) may be effected. These alloying additions, mainly eutectoid formers, have been found, at critical concentrations, to cause a CET to occur, resulting in a relatively fine equiaxed microstructure. The amount of solute addition for these elements usually exceeds their solubility limit in the various titanium alloys, and a further effort involving alloy development is required. Two types of alloys are being developed, the first with essentially identical properties as the (given) base alloy, and the second, alloys with enhanced properties. These various efforts will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Characterization |