scholarly journals Influence of Titanium on Microstructure, Phase Formation and Wear Behaviour of AlCoCrFeNiTix High-Entropy Alloy

Entropy ◽  
2018 ◽  
Vol 20 (7) ◽  
pp. 505 ◽  
Author(s):  
Martin Löbel ◽  
Thomas Lindner ◽  
Thomas Mehner ◽  
Thomas Lampke
Keyword(s):  
Phase Formation ◽  
Wear Behaviour ◽  
High Entropy Alloy ◽  
High Entropy

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.

scholarly journals Enhanced Wear Behaviour of Spark Plasma Sintered AlCoCrFeNiTi High-Entropy Alloy Composites

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2225 ◽  
Author(s):  
Martin Löbel ◽  
Thomas Lindner ◽  
Thomas Lampke
Keyword(s):  
Wear Resistance ◽  
High Hardness ◽  
Solid Lubricants ◽  
Wear Behaviour ◽  
High Entropy Alloy ◽  
Surface Protection ◽  
High Entropy ◽  
Production Route ◽  
The Coefficient Of Friction ◽  
Spark Plasma

High hardness and good wear resistance have been revealed for the high-entropy alloy (HEA) system AlCoCrFeNiTi, confirming the potential for surface protection applications. Detailed studies to investigate the microstructure and phase formation have been carried out using different production routes. Powder metallurgical technologies allow for much higher flexibility in the customisation of materials compared to casting processes. Particularly, spark plasma sintering (SPS) enables the fast processing of the feedstock, the suppression of grain coarsening and the production of samples with a low porosity. Furthermore, solid lubricants can be incorporated for the improvement of wear resistance and the reduction of the coefficient of friction (COF). This study focuses on the production of AlCoCrFeNiTi composites comprising solid lubricants. Bulk materials with a MoS2 content of up to 15 wt % were produced. The wear resistance and COF were investigated in detail under sliding wear conditions in ball-on-disk tests at room temperature and elevated temperature. At least 10 wt % of MoS2 was required to improve the wear behaviour in both test conditions. Furthermore, the effects of the production route and the content of solid lubricant on microstructure formation and phase composition were investigated. Two major body-centred cubic (bcc) phases were detected in accordance with the feedstock. The formation of additional phases indicated the decomposition of MoS2.

Nano-phase formation accompanying phase separation in undercooled CoCrCuFeNi-3 at.% Sn high entropy alloy

2018 ◽  
Vol 144 ◽  
pp. 516-521 ◽  
Author(s):  
S. Wang ◽  
Z. Chen ◽  
L.C. Feng ◽  
Y.Y. Liu ◽  
P. Zhang ◽  
...  
Keyword(s):  
Phase Separation ◽  
Phase Formation ◽  
High Entropy Alloy ◽  
High Entropy

Second phase formation in the CoCrFeNiMn high entropy alloy after recrystallization annealing

2016 ◽  
Vol 185 ◽  
pp. 1-4 ◽  
Author(s):  
N.D. Stepanov ◽  
D.G. Shaysultanov ◽  
M.S. Ozerov ◽  
S.V. Zherebtsov ◽  
G.A. Salishchev
Keyword(s):  
Phase Formation ◽  
Recrystallization Annealing ◽  
High Entropy Alloy ◽  
Second Phase ◽  
High Entropy

Microstructure, phase formation and physical properties of AlCoCrFeNiMn high-entropy alloy

2020 ◽  
Vol 820 ◽  
pp. 153228 ◽  
Author(s):  
S.A. Uporov ◽  
R.E. Ryltsev ◽  
V.A. Bykov ◽  
S. Kh Estemirova ◽  
D.A. Zamyatin
Keyword(s):  
Physical Properties ◽  
Phase Formation ◽  
High Entropy Alloy ◽  
High Entropy

scholarly journals Effect of Al Content on Phase Compositions of FeNiCoCrMo0.5Alx High Entropy Alloy

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1734
Author(s):  
Anton Semikolenov ◽  
Svetlana Shalnova ◽  
Victor Klinkov ◽  
Valentina Andreeva ◽  
Maria Salynova ◽  
...  
Keyword(s):  
Solid Solution ◽  
Phase Formation ◽  
Test Methods ◽  
Point Of View ◽  
High Entropy Alloy ◽  
Induction Melting ◽  
Σ Phase ◽  
High Entropy ◽  
Al Content ◽  
B2 Phase

The FeCoNiCrMo0.5Alx system with x up to 2.13 was analyzed from the point of view of evolution of the phase composition and microstructure. Cast samples were synthesized by induction melting and analyzed by X-ray diffraction, energy dispersive spectroscopy, scanning electron microscopy, and Vickers microhardness test methods. Phase compositions of these alloys in dependance on Al concentration consist of FCC solid solution, σ-phase, NiAl-based B2 phase, and BCC solid solution enriched with Mo and Cr. Phase formation principles were studied. Al dissolves in a FeCoNiCrMo0.5 FCC solid solution up to 8 at.%.; at higher concentrations, Al attracts Ni, removing it from FCC solid solution and forming the B2 phase. Despite Al not participating in σ-phase formation, an increase in Al concentration to about 20 at.% leads to a growth in the σ-phase fraction. The increase in the σ-phase was caused by an increase in the amount of B2 because the solubility of σ-forming Mo and Cr in B2 was less than that in the FCC solution. A further increase in Al concentration led to an excess of Mo and Cr in the solution, which formed a disordered BCC solid solution. The hardness of the alloys attained the maximum of 630 HV at 22 and 32 at.% Al.

Phase formation criteria assessment on the microstructure of a new refractory high entropy alloy

2017 ◽  
Vol 131 ◽  
pp. 51-54 ◽  
Author(s):  
A.E. Karantzalis ◽  
A. Poulia ◽  
E. Georgatis ◽  
D. Petroglou
Keyword(s):  
Phase Formation ◽  
High Entropy Alloy ◽  
High Entropy
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