scholarly journals Applications of High-Pressure Technology for High-Entropy Alloys: A Review

Metals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 867 ◽  
Author(s):  
Wanqing Dong ◽  
Zheng Zhou ◽  
Mengdi Zhang ◽  
Yimo Ma ◽  
Pengfei Yu ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressures ◽  
High Pressure Torsion ◽  
Effective Means ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Depth Study ◽  
New Material ◽  
Diamond Anvil ◽  
Metal Materials

High-entropy alloys are a new type of material developed in recent years. It breaks the traditional alloy-design conventions and has many excellent properties. High-pressure treatment is an effective means to change the structures and properties of metal materials. The pressure can effectively vary the distance and interaction between molecules or atoms, so as to change the bonding mode, and form high-pressure phases. These new material states often have different structures and characteristics, compared to untreated metal materials. At present, high-pressure technology is an effective method to prepare alloys with unique properties, and there are many techniques that can achieve high pressures. The most commonly used methods include high-pressure torsion, large cavity presses and diamond-anvil-cell presses. The materials show many unique properties under high pressures which do not exist under normal conditions, providing a new approach for the in-depth study of materials. In this paper, high-pressure (HP) technologies applied to high-entropy alloys (HEAs) are reviewed, and some possible ways to develop good properties of HEAs using HP as fabrication are introduced. Moreover, the studies of HEAs under high pressures are summarized, in order to deepen the basic understanding of HEAs under high pressures, which provides the theoretical basis for the application of high-entropy alloys.

scholarly journals Effect of carbon content and annealing on structure and hardness of CrFe2NiMnV0.25 high-entropy alloys processed by high-pressure torsion

2018 ◽  
Vol 53 (16) ◽  
pp. 11813-11822 ◽  
Author(s):  
Hamed Shahmir ◽  
Elena Tabachnikova ◽  
Aleksey Podolskiy ◽  
Mikhail Tikhonovsky ◽  
Terence G. Langdon
Keyword(s):  
High Pressure ◽  
Carbon Content ◽  
High Pressure Torsion ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals High-Pressure Torsion for Synthesis of High-Entropy Alloys

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1263
Author(s):  
Kaveh Edalati ◽  
Hai-Wen Li ◽  
Askar Kilmametov ◽  
Ricardo Floriano ◽  
Christine Borchers
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
High Light ◽  
Metallic Alloys ◽  
High Entropy Alloys ◽  
Hydrogen Storage Properties ◽  
High Entropy ◽  
Ultrafine Grained ◽  
Light Absorbance ◽  
Storage Properties

High-pressure torsion (HPT) is widely used not only as a severe plastic deformation (SPD) method to produce ultrafine-grained metals but also as a mechanical alloying technique to synthesize different alloys. In recent years, there have been several attempts to synthesize functional high-entropy alloys using the HPT method. In this paper, the application of HPT to synthesize high-entropy materials including metallic alloys, hydrides, oxides and oxynitrides for enhanced mechanical and hydrogen storage properties, photocatalytic hydrogen production and high light absorbance is reviewed.

scholarly journals The thermal conductivity of the Earth's core and implications for its thermal and compositional evolution

2020 ◽  
Author(s):  
Kenji Ohta ◽  
Kei Hirose
Keyword(s):  
Thermal Conductivity ◽  
High Pressure ◽  
Thermal History ◽  
Diamond Anvil Cell ◽  
High Pressures ◽  
Iron Alloys ◽  
Compositional Evolution ◽  
The Earth ◽  
Diamond Anvil ◽  
High Pressures And Temperatures

Abstract Precise determinations of the thermal conductivity of iron alloys at high pressures and temperatures are essential for understanding the thermal history and dynamics of the metallic cores of the Earth. We review relevant high-pressure experiments using a diamond-anvil cell and discuss implications of high core conductivity for its thermal and compositional evolution.

scholarly journals On prominent TRIP effect and non-basal slip in a TWIP high entropy alloy during high-pressure torsion processing

2021 ◽  
pp. 111284
Author(s):  
A.K. Chandan ◽  
P.T. Hung ◽  
K. Kishore ◽  
M. Kawasaki ◽  
J. Chakraborty ◽  
...  
Keyword(s):  
High Pressure ◽  
Basal Slip ◽  
High Pressure Torsion ◽  
High Entropy Alloy ◽  
Trip Effect ◽  
High Entropy

scholarly journals Evolution of microstructure and hardness in Hf25Nb25Ti25Zr25 high-entropy alloy during high-pressure torsion

2019 ◽  
Vol 788 ◽  
pp. 318-328 ◽  
Author(s):  
Jenő Gubicza ◽  
Anita Heczel ◽  
Megumi Kawasaki ◽  
Jae-Kyung Han ◽  
Yakai Zhao ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Evolution Of Microstructure

Statistical Analysis Method of the Grain Structure of Nanostructured Single Phase Metal Materials Processed by High-Pressure Torsion

2018 ◽  
Vol 284 ◽  
pp. 425-430 ◽  
Author(s):  
Alexey V. Stolbovsky ◽  
Elena Farafontova
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Statistical Analysis ◽  
Single Phase ◽  
High Pressure Torsion ◽  
Grain Structure ◽  
Analysis Method ◽  
Tin Bronze ◽  
Statistical Analysis Method ◽  
Metal Materials

The statistical analysis method of the grain structure in bulk single-phase metal materials subjected to high-pressure torsion is proposed. The possibility of methods division of mathematical statistics observed in the grain structure materials by their sizes with the several groups identification, having various behavior at further heating is presented. The example of the grain structure analysis on the nanostructured tin bronze is given. The agreement of the received analysis results with experimental data is offered.

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