Predicting single phase CrMoWX high entropy alloys from empirical relations in combination with first-principles calculations

2017 ◽  
Vol 83 ◽  
pp. 9-16 ◽  
Author(s):  
Fuyang Tian ◽  
Lajos Károly Varga ◽  
Levente Vitos
Keyword(s):  
First Principles ◽  
Single Phase ◽  
High Entropy Alloys ◽  
First Principles Calculations ◽  
High Entropy ◽  
Empirical Relations

scholarly journals Unconventional Deformation Behaviours of Nanoscaled High-Entropy Alloys

Entropy ◽  
2018 ◽  
Vol 20 (10) ◽  
pp. 778 ◽  
Author(s):  
Yeqiang Bu ◽  
Shenyou Peng ◽  
Shiwei Wu ◽  
Yujie Wei ◽  
Gang Wang ◽  
...  
Keyword(s):  
Phase Transformations ◽  
First Principles ◽  
Atomic Scale ◽  
High Entropy Alloys ◽  
First Principles Calculations ◽  
High Entropy ◽  
Fcc Metals ◽  
The Stability ◽  
Similar Deformation

The bulk high-entropy alloys (HEAs) exhibit similar deformation behaviours as traditional metals. These bulk behaviours are likely an averaging of the behaviours exhibited at the nanoscale. Herein, in situ atomic-scale observation of deformation behaviours in nanoscaled CoCrCuFeNi face-centred cubic (FCC) HEA was performed. The deformation behaviours of this nanoscaled FCC HEA (i.e., nanodisturbances and phase transformations) were distinct from those of nanoscaled traditional FCC metals and corresponding bulk HEA. First-principles calculations revealed an obvious fluctuation of the stacking fault energy and stability difference at the atomic scale in the HEA. The stability difference was highlighted only in the nanoscaled HEA and induced unconventional deformation behaviours. Our work suggests that the nanoscaled HEA may provide more chances to discover the long-expected essential distinction between the HEAs and traditional metals.

A review on phase prediction in high entropy alloys

2021 ◽  
pp. 095440622110089
Author(s):  
Vinay Kumar Soni ◽  
S Sanyal ◽  
K Raja Rao ◽  
Sudip K Sinha
Keyword(s):  
Solid Solution ◽  
Phase Formation ◽  
Single Phase ◽  
High Entropy Alloy ◽  
High Entropy Alloys ◽  
Modeling Tools ◽  
High Entropy ◽  
Recent Developments ◽  
Phase Prediction ◽  
The Stability

The formation of single phase solid solution in High Entropy Alloys (HEAs) is essential for the properties of the alloys therefore, numerous approach were proposed by many researchers to predict the stability of single phase solid solution in High Entropy Alloy. The present review examines some of the recent developments while using computational intelligence techniques such as parametric approach, CALPHAD, Machine Learning etc. for prediction of various phase formation in multicomponent high entropy alloys. A detail study of this data-driven approaches pertaining to the understanding of structural and phase formation behaviour of a new class of compositionally complex alloys is done in the present investigation. The advantages and drawbacks of the various computational are also discussed. Finally, this review aims at understanding several computational modeling tools complying the thermodynamic criteria for phase formation of novel HEAs which could possibly deliver superior mechanical properties keeping an aim at advanced engineering applications.

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