About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
Powder Blown Directed Energy Deposition of Nickel-titanium Shape Memory Alloys: Process-structure-property Relationship |
Author(s) |
Dyuti Sarker, Samad Firdosy, Nicholas Ury, James Tsangarides, Lauren G Holm, Aaron P Stebner |
On-Site Speaker (Planned) |
Dyuti Sarker |
Abstract Scope |
Additive manufacturing of nickel-titanium (NiTi)_ shape memory alloys has attained much attention as such technology promises the ability for 3D printing multi-functional thermomechanical systems. Much of the AM focus to date has been on the development of laser powder bed fusion process parameters. However, powder blown directed energy deposition (DED) has several desirable characteristics including easier grading of material composition by controlling mixing of powders from multiple compositions into the powder blown gas stream during manufacture to enable local control of martensitic transformation temperatures. Here, we report upon new characterizations of porosity and cracking, microstructures, martensitic phase transformation temperatures, and superelastic performances as a function of DED process parameter and post-process heat treatment variations. Through a methodical production approach, the relationship between process parameters, microstructural characterizations, and defect formation mechanisms are correlated to maximizing functional performance. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Other, Other |