Related references
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Article
Engineering, Mechanical
Tinghong Gao et al.
Summary: This study investigates the effects of voids on the mechanical properties of high entropy alloys (HEAs) using molecular dynamics simulations. The results demonstrate that the existence of voids does influence the mechanical properties of HEAs, and the size and temperature of the voids also play a role in determining the mechanical properties of HEAs.
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Computer Science, Interdisciplinary Applications
Aidan P. Thompson et al.
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Zhi Hui Sun et al.
Summary: This paper investigates the properties of CoCrFeNi(Al0.3Ti0.2)(x) high-entropy alloys (HEAs) with different Ti and Al contents, as well as the effect of temperature on their mechanical properties. The experimental results show that the addition of Ti and Al can significantly improve the mechanical properties of CoCrFeNi HEAs. Molecular dynamics simulations also confirm that the elastic modulus and tensile strength of CoCrFeNi(Al0.3Ti0.2)(x) HEAs are enhanced with the addition of Ti and Al.
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Summary: The interaction mechanisms between dislocations and twin boundaries in high-entropy alloys (HEAs) are studied, and differences between HEAs and pure Ni are observed, possibly related to the statistical fluctuation of chemical ordering.
COMPUTATIONAL MATERIALS SCIENCE
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X. P. Zhu et al.
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Article
Materials Science, Multidisciplinary
Aayush Sharma et al.
Summary: Phase diagrams supported by density functional theory methods are important for designing high entropy alloys. In this study, phase and property analysis of quinary refractory high-entropy alloys were conducted using CALPHAD and density-functional theory results, revealing a stable single-phase body-centered-cubic structure in a Mo-W-rich region. The Mo-W-rich compositions show reproducible hysteresis in stress-strain responsible for pseudo-elastic behavior.
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Shijun Zhao et al.
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Article
Multidisciplinary Sciences
Shashank Mishra et al.
Summary: Refractory high entropy alloys (R-HEAs) have gained prominence for their high strength and hardness properties in various applications. This study computationally investigates the properties of TaNbHfZr R-HEA, focusing on the role of nanostructure evolution, dislocation simulations, and the ductile to brittle transition behavior. The findings provide insights into the relationship between mechanical properties and local nanostructure, with implications for materials design and development.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Eleanor Mak et al.
Summary: The current goal of alloy development is to identify alloy compositions for high temperature applications with sufficient ductility at ambient temperatures. High Entropy Alloys (HEAs) have emerged as a new class of metal alloys, with some compositions showing excellent strength retention at high temperatures but low ductility at room temperature. The study investigates the macroscopic ductility in bcc elements and alloys, and proposes a ductility criterion based on stress intensities for critical crack orientations, which is then applied to HEAs to identify new compositions with potential for room temperature ductility.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Multidisciplinary Sciences
Sheng Yin et al.
Summary: The presence of short-range order influences the mobility of dislocations in high-entropy alloys, with edge dislocations being enhanced and double-kink nucleation in screw dislocations being reduced. A cross-slip locking mechanism is observed for the motion of screws, providing extra strengthening for refractory high-entropy alloy system.
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Article
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O. N. Senkov et al.
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(2013)