About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
|
Symposium
|
High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond IV
|
Presentation Title |
Study of Microstructure and Deformation Behavior of MnFeNi Medium Entropy Alloy |
Author(s) |
Jiashi Miao, Xuejun Huang, Alan A. Luo |
On-Site Speaker (Planned) |
Jiashi Miao |
Abstract Scope |
The equiatomic MnFeNi medium entropy alloy is a promising material for applications that require high thermal dilation and strength, thanks to its remarkable anti-invar behavior. In this study, the deformation microstructure of MnFeNi alloy was examined at various levels of plastic strains using electron backscatter diffraction (EBSD) and scanning transmission electron microscopy (STEM) techniques. Dislocation slip was found to exhibit planar slip character in the early stages of deformation, and dislocation cells appeared in the microstructure with increasing plastic deformation. Furthermore, the stacking fault energy of the MnFeNi alloy was calculated using both conventional thermodynamic-based modeling and density functional theory calculations. The influence of stacking fault energy and friction stress on dislocation slip character, deformation microstructure evolution, and work hardening of the MnFeNi medium entropy alloy will be discussed. |