Short-range ordering and its effects on mechanical properties of high-entropy alloys

2021 ◽  
Vol 62 ◽  
pp. 214-220 ◽  
Author(s):  
Yuan Wu ◽  
Fei Zhang ◽  
Xiaoyuan Yuan ◽  
Hailong Huang ◽  
Xiaocan Wen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Short Range ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Short Range Ordering

scholarly journals Simultaneously enhancing the ultimate strength and ductility of high-entropy alloys via short-range ordering

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Shuai Chen ◽  
Zachary H. Aitken ◽  
Subrahmanyam Pattamatta ◽  
Zhaoxuan Wu ◽  
Zhi Gen Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ultimate Strength ◽  
Short Range ◽  
Density Functional ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Body Center Cubic ◽  
Short Range Ordering ◽  
Composite Microstructure ◽  
Strength And Ductility

AbstractSimultaneously enhancing strength and ductility of metals and alloys has been a tremendous challenge. Here, we investigate a CoCuFeNiPd high-entropy alloy (HEA), using a combination of Monte Carlo method, molecular dynamic simulation, and density-functional theory calculation. Our results show that this HEA is energetically favorable to undergo short-range ordering (SRO), and the SRO leads to a pseudo-composite microstructure, which surprisingly enhances both the ultimate strength and ductility. The SRO-induced composite microstructure consists of three categories of clusters: face-center-cubic-preferred (FCCP) clusters, indifferent clusters, and body-center-cubic-preferred (BCCP) clusters, with the indifferent clusters playing the role of the matrix, the FCCP clusters serving as hard fillers to enhance the strength, while the BCCP clusters acting as soft fillers to increase the ductility. Our work highlights the importance of SRO in influencing the mechanical properties of HEAs and presents a fascinating route for designing HEAs to achieve superior mechanical properties.

Chemical short-range ordering and its strengthening effect in refractory high-entropy alloys

2021 ◽  
Vol 103 (10) ◽  
Author(s):  
S. D. Wang ◽  
X. J. Liu ◽  
Z. F. Lei ◽  
D. Y. Lin ◽  
F. G. Bian ◽  
...  
Keyword(s):  
Short Range ◽  
High Entropy Alloys ◽  
Strengthening Effect ◽  
High Entropy ◽  
Short Range Ordering

scholarly journals Chemical-Affinity Disparity and Exclusivity Drive Atomic Segregation, Short-Range Ordering, and Cluster Formation in High-Entropy Alloys

2021 ◽  
Vol 206 ◽  
pp. 116638
Author(s):  
Shuai Chen ◽  
Zachary H. Aitken ◽  
Subrahmanyam Pattamatta ◽  
Zhaoxuan Wu ◽  
Zhi Gen Yu ◽  
...  
Keyword(s):  
Short Range ◽  
Cluster Formation ◽  
High Entropy Alloys ◽  
Chemical Affinity ◽  
High Entropy ◽  
Atomic Segregation ◽  
Short Range Ordering

scholarly journals Prediction of short range order in high-entropy alloys and its effect on the electronic, magnetic and mechanical properties

2020 ◽  
Vol 69 (4) ◽  
pp. 046102
Author(s):  
Xian-Li Ren ◽  
Wei-Wei Zhang ◽  
Xiao-Yong Wu ◽  
Lu Wu ◽  
Yue-Xia Wang
Keyword(s):  
Mechanical Properties ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
High Entropy Alloys ◽  
High Entropy

scholarly journals Chemical short-range order in derivative Cr–Ta–Ti–V–W high entropy alloys from the first-principles thermodynamic study

2020 ◽  
Vol 22 (41) ◽  
pp. 23929-23951
Author(s):  
Damian Sobieraj ◽  
Jan S. Wróbel ◽  
Tomasz Rygier ◽  
Krzysztof J. Kurzydłowski ◽  
Osman El Atwani ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Monte Carlo ◽  
First Principles ◽  
Short Range ◽  
Density Functional ◽  
Short Range Order ◽  
High Entropy Alloys ◽  
Functional Theory ◽  
High Entropy ◽  
Short Range Ordering

Density Functional Theory (DFT), Cluster Expansion and Monte Carlo simulations have been carried out to investigate the short-range ordering in high-entropy alloys in Cr–Ta–Ti–V–W system as a function of temperature and composition.

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