Accurate <i>ab initio</i> modeling of solid solution strengthening in high entropy alloys
نویسندگان
چکیده
High entropy alloys (HEA) represent a class of materials with promising properties, such as high strength and ductility, radiation damage tolerance, etc. At the same time, combinatorially large variety compositions complex structure render them quite hard to study using conventional methods. In this work, we present computationally efficient methodology based on ab initio calculations within coherent potential approximation. To make predictive, apply an exchange-correlation correction equation state take into account thermal effects magnetic equilibrium volume. The approach shows good agreement available experimental data bulk properties solid solutions. As particular case, workflow is applied series iron-group HEA investigate their solution strengthening parameter-free model effective medium representation alloy. results reveal intricate interactions between alloy components, which analyze by means simple local bonding. Thanks its computational efficiency, can be used basis for adaptive learning optimal design HEA.
منابع مشابه
A Review of Solid-Solution Models of High-Entropy Alloys Based on Ab Initio Calculations
Similar to the importance of XRD in experiments, ab initio calculations, as a powerful tool, have been applied to predict the new potential materials and investigate the intrinsic properties of materials in theory. As a typical solid-solution material, the large degree of uncertainty of high-entropy alloys (HEAs) results in the difficulty of ab initio calculations application to HEAs. The prese...
متن کاملSize effect, critical resolved shear stress, stacking fault energy, and solid solution strengthening in the CrMnFeCoNi high-entropy alloy
High-entropy alloys (HEAs) comprise a novel class of scientifically and technologically interesting materials. Among these, equatomic CrMnFeCoNi with the face-centered cubic (FCC) structure is noteworthy because its ductility and strength increase with decreasing temperature while maintaining outstanding fracture toughness at cryogenic temperatures. Here we report for the first time by single-c...
متن کاملMulticomponent and High Entropy Alloys
This paper describes some underlying principles of multicomponent and high entropy alloys, and gives some examples of these materials. Different types of multicomponent alloy and different methods of accessing multicomponent phase space are discussed. The alloys were manufactured by conventional and high speed solidification techniques, and their macroscopic, microscopic and nanoscale structure...
متن کاملSuperior hydrogen storage in high entropy alloys
Metal hydrides (MHx) provide a promising solution for the requirement to store large amounts of hydrogen in a future hydrogen-based energy system. This requires the design of alloys which allow for a very high H/M ratio. Transition metal hydrides typically have a maximum H/M ratio of 2 and higher ratios can only be obtained in alloys based on rare-earth elements. In this study we demonstrate, f...
متن کاملLocal lattice distortion in high-entropy alloys
Hongquan Song,1 Fuyang Tian,1,* Qing-Miao Hu,2,† Levente Vitos,3,4,5 Yandong Wang,6 Jiang Shen,1 and Nanxian Chen1,7 1Institute for Applied Physics, University of Science and Technology Beijing, Beijing 100083, China 2Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China 3Applied Materials Physics, Department of Mater...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Materials
سال: 2022
ISSN: ['2476-0455', '2475-9953']
DOI: https://doi.org/10.1103/physrevmaterials.6.103602