Phase stability of non-equiatomic CoCrFeMnNi high entropy alloys
Source abstract
Abstract
Abstract The objective of this study is to experimentally and theoretically investigate the phase stability of non-equiatomic FexMn62−xNi30Co6Cr2 based high entropy alloys, where x ranges from 22 to 42 at.%. Another aim is to systematically and critically assess the predictive capability of the CALPHAD approach for such high entropy alloy systems. We find that the CALPHAD simulations provide a very consistent assessment of phase stability yielding good agreement with experimental observations. These include the equilibrium phase formation at high temperatures, the constituent phases after non-equilibrium solidification processes, unfavorable segregation profiles inherited from solidification together with the associated nucleation and growth of low temperature phases, and undesired martensitic transformation effects. Encouraged by these consistent theoretical and experimental results, we extend our simulations to other alloy systems with equiatomic compositions reported in the literature. Using these other equiatomic model systems we demonstrate how systematic CALPHAD simulations can improve and accelerate the design of multicomponent alloy systems.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · Additive Manufacturing Materials and Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Alloyed pleasures: multimetallic cocktails
2. Nanostructured high-entropy alloys with multiple principal elements: novel alloy design concepts and outcomes10.1002/adem.200300567 ↗
3. Alloy design strategies and future trends in high-entropy alloys10.1007/s11837-013-0761-6 ↗
4. Microstructures and properties of high-entropy alloys
5. High-entropy alloys: a critical review10.1080/21663831.2014.912690 ↗
6. Multicomponent and high entropy alloys10.3390/e16094749 ↗
7. A.J.B. Vincent, A study of three multicomponent alloys (BSc Part II thesis), University of Sussex, UK, 1981.
8. P. Knight, Multicomponent alloys (BSc Part II thesis), University of Oxford, UK, 1995.
9. Microstructural development in equiatomic multicomponent alloys10.1016/j.msea.2003.10.257 ↗
10. Novel multicomponent alloys
11. Effect of decomposition of the Cr–Fe–Co rich phase of AlCoCrCuFeNi high entropy alloy on magnetic properties10.1016/j.ultramic.2010.12.001 ↗
12. Relative effects of enthalpy and entropy on the phase stability of equiatomic high-entropy alloys10.1016/j.actamat.2013.01.042 ↗
13. A fracture-resistant high-entropy alloy for cryogenic applications10.1126/science.1254581 ↗
14. Incipient plasticity and dislocation nucleation of FeCoCrNiMn high-entropy alloy10.1016/j.actamat.2013.01.059 ↗
15. Steady state flow of the FeCoNiCrMn high entropy alloy at elevated temperatures10.1016/j.intermet.2014.06.015 ↗
16. In-situ neutron diffraction studies on high-temperature deformation behavior in a CoCrFeMnNi high entropy alloy10.1016/j.intermet.2015.02.020 ↗
17. A novel, single phase, non-equiatomic FeMnNiCoCr high-entropy alloy with exceptional phase stability and tensile ductility10.1016/j.scriptamat.2013.09.030 ↗
18. Composition dependence of phase stability, deformation mechanisms, and mechanical properties of the CoCrFeMnNi high-entropy alloy system10.1007/s11837-014-1133-6 ↗
19. Cohesion in alloys – fundamentals of a semi-empirical model10.1016/0378-4363(80)90054-6 ↗
20. Solid-solution phase formation rules for multi-component alloys10.1002/adem.200700240 ↗
21. Prediction of high-entropy stabilized solid-solution in multi-component alloys10.1016/j.matchemphys.2011.11.021 ↗
22. Alloy design and properties optimization of high-entropy alloys10.1007/s11837-012-0366-5 ↗
23. Electronic and thermodynamic criteria for the occurrence of high entropy alloys in metallic systems10.1016/j.actamat.2014.04.033 ↗
24. Phase stability in high entropy alloys: Formation of solid-solution phase or amorphous phase10.1016/S1002-0071(12)60080-X ↗
25. Effect of valence electron concentration on stability of fcc or bcc phase in high entropy alloys10.1063/1.3587228 ↗
26. A geometrical parameter for the formation of disordered solid solutions in multi-component alloys10.1016/j.intermet.2014.04.019 ↗
27. Hybrid monte carlo/molecular dynamics simulation of a refractory metal high entropy alloy10.1007/s11661-013-2000-8 ↗
28. Prediction of A2 to B2 phase transition in the high-entropy alloy Mo–Nb–Ta–W10.1007/s11837-013-0772-3 ↗
29. The thermodynamic modeling of multicomponent phase equilibria10.1007/s11837-997-0024-5 ↗
30. Rapid alloy prototyping: compositional and thermo-mechanical high throughput bulk combinatorial design of structural materials based on the example of 30Mn–1.2C–xAl triplex steels10.1016/j.actamat.2012.05.017 ↗
31. Thermo-Calc & Dictra, computational tools for materials science10.1016/S0364-5916(02)00037-8 ↗
32. Sluggish diffusion in CoCrFeMnNi high-entropy alloys10.1016/j.actamat.2013.04.058 ↗
33. M.J. Yao, Non-equiatomic FeMnNiCoCr high entropy alloys: microstructure, phase stability and mechanical behavior (Master’s thesis), Rheinisch-Westfälische Technische Hochschule Aachen, 2013.
34. Insights into the phase diagram of the CrMnFeCoNi high entropy alloy10.1016/j.actamat.2015.01.068 ↗
35. An understanding of high entropy alloys from phase diagram calculations10.1016/j.calphad.2013.10.006 ↗
36. An understanding of high entropy alloys from phase diagram calculations10.1016/j.calphad.2013.10.006 ↗
37. Atomic-scale compositional characterization of a nanocrystalline AlCrCuFeNiZn high-entropy alloy using atom probe tomography10.1016/j.actamat.2013.04.059 ↗
38. Exploration and development of high entropy alloys for structural applications10.3390/e16010494 ↗
39. Accelerated exploration of multi-principal element alloys with solid solution phases10.1038/ncomms7529 ↗