| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thin Films and Coatings: Properties, Processing and Applications
|
| Presentation Title |
Thermal Stability and Mechanical Properties of μ-Phase Composition W-Fe-Ni-Mo Multi-Principal Element Alloy Film |
| Author(s) |
Zahidur Rahman, Michael J. Detisch, Thomas Balk |
| On-Site Speaker (Planned) |
Zahidur Rahman |
| Abstract Scope |
It is believed that topologically close-packed ultrastrong µ-phase precipitates interspersed throughout the matrix of equiatomic W-Mo-Fe-Ni alloy cause adiabatic shear banding susceptibility during high strain rate deformation. This study explores the thermal stability and mechanical properties of a µ-phase W-Mo-Fe-Ni alloy thin film, deposited via magnetron co-sputtering on sapphire. The primary objective is to investigate µ-phase behavior through controlled vacuum annealing from 500°C to 900°C. Microstructural evolution is analyzed using SEM, EDS, and XRD, revealing changes in morphology, composition, and crystal structure. Mechanical properties (hardness, modulus, and strain-rate sensitivity) are evaluated via nanoindentation, providing insights into material response under mechanical stress. Comparative analysis of as-deposited and annealed films, complemented by in-situ XRD heating experiments, elucidates phase transformations and thermal stability mechanisms. This research contributes to understanding the relationship between microstructure and mechanical behavior in MPEA alloys, especially with respect to adiabatic shear banding behavior in advanced materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Thin Films and Interfaces, Mechanical Properties |