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- Title
Composition Dependence of Phase Stability, Deformation Mechanisms, and Mechanical Properties of the CoCrFeMnNi High-Entropy Alloy System.
- Authors
Tasan, C.; Deng, Y.; Pradeep, K.; Yao, M.; Springer, H.; Raabe, D.
- Abstract
The proposal of configurational entropy maximization to produce massive solid-solution (SS)-strengthened, single-phase high-entropy alloy (HEA) systems has gained much scientific interest. Although most of this interest focuses on the basic role of configurational entropy in SS formability, setting future research directions also requires the overall property benefits of massive SS strengthening to be carefully investigated. To this end, taking the most promising CoCrFeMnNi HEA system as the starting point, we investigate SS formability, deformation mechanisms, and the achievable mechanical property ranges of different compositions and microstructural states. A comparative assessment of the results with respect to room temperature behavior of binary Fe-Mn alloys reveals only limited benefits of massive SS formation. Nevertheless, the results also clarify that the compositional requirements in this alloy system to stabilize the face-centered cubic (fcc) SS are sufficiently relaxed to allow considering nonequiatomic compositions and exploring improved strength-ductility combinations at reduced alloying costs.
- Subjects
MAXIMUM entropy method; SOLID solutions; ALLOYS; DEFORMATIONS (Mechanics); DUCTILITY
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2014, Vol 66, Issue 10, p1993
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-014-1133-6