Deviation from high-entropy configurations in the atomic distributions of a multi-principal-element alloy
By L. Santodonato, Yang Zhang, M. Feygenson, C. Parish, Michael C. Gao, R. Weber, J. Neuefeind, Zhi Tang, P. K. Liaw. Nature Communications, 2015
641 citations recorded by the source corpus.
The alloy-design strategy of combining multiple elements in near-equimolar ratios has shown great potential for producing exceptional engineering materials, often known as ‘high-entropy alloys’. Understanding the elemental distribution, and, thus, the evolution of the configurational entropy during solidification, is undertaken in the present study using the Al1.3CoCrCuFeNi model alloy. Here we show that, even when the material undergoes elemental segregation, precipitation, chemical ordering and spinodal decomposition, a significant amount of disorder remains, due to the distributions of multiple elements in the major phases. The results suggest that the high-entropy alloy-design strategy may be applied to a wide range of complex materials, and should not be limited to the goal of creating single-phase solid solutions. Alloys containing multiple elements of equal distributions are known to show enhanced properties as they tend to form single phases. Here, the authors demonstrate that even in cases of elemental segregation and chemical ordering, these alloys can still maintain enhanced properties.
Subfields: Aerospace Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/0a50217bad3781eab57e85dc716c73d8bed6750b
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Citations in the corpus
- Corrosion-resistant high-entropy alloys: A review (2017, background): “Furthermore, the exceptional properties, such as the combined noble strength-ductility [22,23], improved fatigue resistance [24–26], high fracture toughness [27,28], and high thermal stability [29], make HEAs attractive in many industrial fields, especially as superior structural alloys, which are h”
- Design of a twinning-induced plasticity high entropy alloy (2015, background): “While multiphase HEAs promote fundamental investigations of phase separation in massive solid solutions, and enlarge the achievable property (and hence application) spectrum [9,10], they essentially do not provide proof-of-principle observations for the original concept described above.”
- A TRIP-assisted dual-phase high-entropy alloy: Grain size and phase fraction effects on deformation behavior (2017, background): “and precipitation which finally led to the occurrence of undesired brittle intermetallic compounds [8,63].”