Author
Radi, Amin, Işıl, Canay, Seyedmohammadi, Seyedveghar, Kim, H. S., Yapıcı, Güney Güven
Publication Date
2023-12-15
Publication Place
-
Elsevier
Subject
Ductility, High entropy alloy, Multi-phase, Nano-indentation, Strength, Thermomechanical processing
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0925-8388
Record ID
86647ea3-5aef-4ed0-90d0-d8052e998318
Library Location
Mechanical Engineering
Date
2023-12-15
Notes
BAGEP Award of the Science Academy, Turkiye
Sample Text
High entropy alloys (HEAs) have garnered significant attention due to their exceptional mechanical behavior. However, the influence of secondary phases and dislocation substructures has yet to be thoroughly investigated. This study focuses on the incorporation of the decomposed η-phase within a face-centered cubic (FCC) microstructure at different recrystallization levels, aiming to achieve adequate ductility while maintaining strength at gigapascal levels. Various characterization techniques were employed to analyze the microstructure of both homogenized and annealed+aged conditions. Implementing a sub-micron grain size distribution and introducing a favorable dislocation substructure significantly enhanced the mechanical properties of yield strength, ultimate tensile strength, and ductility, reaching up to 1291 MPa, 1450 MPa, and 17.5%, respectively. The results highlight the influential role of grain size in facilitating the generation of geometrically necessary dislocations during plastic deformation.
DOI
10.1016/j.jallcom.2023.172093
Cilt
968
