About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Feedstock Processing for Multifunctional Materials
|
| Presentation Title |
Influence of In Situ and Ex Situ Heat Treatments on the Mechanical Behavior of LPBF-Fabricated Fe–Mn–Al–Ni Shape Memory Alloys |
| Author(s) |
Ala Qattawi, Anwar Algamal, Umesh Gandhi |
| On-Site Speaker (Planned) |
Ala Qattawi |
| Abstract Scope |
This study investigates the fabrication of Fe–Mn–Al–Ni iron-based shape memory alloys (SMAs) using laser powder bed fusion (LPBF) across a range of laser powers. The influence of energy input on material properties was assessed by evaluating the resulting volumetric energy density. Samples were produced under both as-built conditions and subjected to in situ and ex situ treatments to enhance performance. Mechanical properties were characterized through macro-indentation, Profilometry-based Indentation Plastometry (PIP), and nanoindentation techniques, while room-temperature compression testing was conducted to assess superelastic behavior. The results showed that increasing the fabrication power improved the mechanical properties of the as-built SMAs. In situ/ex situ treatments led to a significant reduction in strength but enhanced ductility by up to 39%, along with a 52% reduction in microhardness. Overall, LPBF-produced SMAs exhibited good strain recovery and stability comparable to those produced by conventional methods. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |