| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
Development of New Ti-64 Modified Alloys for Additive Manufacturing with Columnar to Equiaxed Transition |
| Author(s) |
Nevin Taylor, Hamish Fraser, Brian Welk, Zachary Kloenne, Andrew Baker |
| On-Site Speaker (Planned) |
Nevin Taylor |
| Abstract Scope |
There are a number of defects associated with the additive manufacturing of titanium alloys that must still be addressed. One such issue is the formation of coarse columnar grains that form parallel to the growth/deposition direction leading to anisotropic properties. In this research, the use of alloying elements, specifically the Beta-eutectoid stabilizers, have been shown to induce a columnar to equiaxed transition through modification of the solidification mechanism. A Laser Engineered Net Shaping (LENS) AM device with two powder hoppers has been used to create gradient builds by varying the alloying elements of interest, narrowing down the composition of the columnar to equiaxed transition and demonstrating the effect of composition on microstructure. Subsequent heat treatments have been investigated to optimize the mechanical properties of the new Ti-64 modified alloys, which show promising results for use in wide-spread applications. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |