Cuboid-like nanostructure strengthened equiatomic Ti–Zr–Nb–Ta medium entropy alloy

Nguyen, Vu; Qian, Ma; Shi, Zhiming; Tran, Xuan Quy; Fabijanic, Daniel; Joseph, Jithin; Qu, Dongdong; Matsumura, Shuichi; Zhang, C; Zhang, F; Zou, Jin

doi:10.1016/j.msea.2020.140169

Cited by 38 publications

(10 citation statements)

References 42 publications

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“…However, the RHEAs containing W and Mo elements generally show high room-temperature brittleness and densities (>13 g/cm 3 [ 9 ]). The TaNbTiZr RHEA developed recently by replacing W and Mo with Ti and Zr can overcome the brittle and heavy bottlenecks and exhibits low density (8.9 g/cm 3 [ 15 ]), as well as high yield strength (410 MPa at 1000 °C [ 16 ]) and fracture strain (>48% at room temperature [ 17 ]), which has attracted extensive interests.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Microstructure of High-Activity Spherical TaNbTiZr Refractory High-Entropy Alloy Powders

Gao

Xie

et al. 2023

Materials

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High-activity spherical TaNbTiZr refractory high-entropy alloy (REHA) powders were successfully prepared by electrode induction melting gas atomization (EIGA) and plasma rotating electrode process (PREP) methods. Both the EIGAed and PREPed TaNbTiZr RHEA powders have a single-phase body-centered cubic (BCC) structure and low oxygen content. Compared with the EIGAed powders, the PREPed powders exhibit higher sphericity and smoother surface, but larger particle size. The average particle sizes of the EIGAed and PREPed powders are 51.8 and 65.9 μm, respectively. In addition, both the coarse EIGAed and PREPed powders have dendritic structure, and the dendrite size of the EIGAed powders is larger than that of the PREPed powders. Theoretical calculation indicates that the cooling rate of the PREPed powders is one order of magnitude higher than that of the EIGAed powders during the solidification process, and the dendritic structure has more time to grow during EIGA, which is the main reason for the coarser dendrite size of the EIGAed powders.

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Section: Introductionmentioning

confidence: 99%

Preparation and Microstructure of High-Activity Spherical TaNbTiZr Refractory High-Entropy Alloy Powders

Gao

Xie

et al. 2023

Materials

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“…Such fcc HEAs are termed as “Cantor-type” alloys, which are the most extensively investigated. The other kind of HEAs is Senkov alloy , crystallizing in a body-centered cubic (bcc) structure and mostly has refractory elements like Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W. Consequently, Senkov alloys are also called refractory HEAs (RHEAs) − and are designed for elevated temperature applications such as aerospace, power-generation industry.…”

Section: Introductionmentioning

confidence: 99%

“…It is accepted that Ti, Nb, Zr, Mo, and Ta are expected to enhance strength and hardness, ductility, corrosion resistance, and wear resistance. There are extensively experimental investigations on Ti–Nb–Zr RMEAs, ,, Ti–Nb–Zr–Ta, ,,, Ti–Nb–Zr–Mo, − , and Ti–Nb–Zr–Hf–Ta , RHEAs. The Sn can restrain the formation of the α″ phase and ω phase and alter the mechanical properties of Ti alloys. − Alternatively, Sn has a strong interaction with other elements, and it can also reduce the density and increase the effect of solid solution strengthening of alloys .…”

Section: Introductionmentioning

confidence: 99%

“…It is accepted that Ti, Nb, Zr, Mo, and Ta are expected to enhance strength and hardness, ductility, corrosion resistance, and wear resistance. There are extensively experimental investigations on Ti−Nb−Zr RMEAs, 23,25,27 Ti−Nb−Zr− Ta, 21,22,24,30 Ti−Nb−Zr−Mo, [31][32][33]51 and Ti−Nb−Zr−Hf− Ta 15,22 RHEAs. The Sn can restrain the formation of the α″ phase and ω phase and alter the mechanical properties of Ti alloys.…”

Section: Introductionmentioning

confidence: 99%

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Alloying Effect on Elastic and Mechanical Properties of Refractory Medium-Entropy Alloys from First-Principles Calculations

Liu

Zhang

et al. 2023

J. Phys. Chem. C

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There is still a challenge to rapidly and accurately acquire the composition dependence of mechanical properties of multi-principal element alloys due to their huge composition space and complex electronic structures. Aiming to straightforwardly tune the mechanical properties through alloying, we systematically calculate the elastic and mechanical properties for four selected body-centered-cubic (bcc) Ti− Nb−M (M = Zr, Mo, Sn, Ta) refractory medium-entropy alloys (RMEAs) using a first-principles method. It is shown that the elastic stability of the bcc RMEAs can be significantly (weakly) improved with the increase in Nb, Mo, and Ta (Sn) content, but it is insensitive to Zr. The elastic stability, elastic modulus, hardness, and strength generally enhance, whereas Pugh's ratio and Zener anisotropy (A Z ) decrease with the increase in valence electron concentration. Additionally, there is a correlation between the magnitude of the A Z and the shape of the single-crystal Young's modulus (E [hkl] ). The largest (smallest) E [hkl] appears in the <111> (<100>) direction. Particularly, the most isotropic Ti 60 Nb 20 Mo 20 has the highest hardness and strength among all the Ti−Nb−M alloys. Moreover, the change of elastic properties induced by alloying is related to the change of density of states. This work sheds deep light on the design of high-performance Ti-based multi-principal element alloys.

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“…Atomistic methods, such as density functional theory (DFT) and molecular dynamics (MD) are being used to investigate the mechanical properties. The CALPHAD method is used to investigate the phase diagrams and the crystal plasticity finite element method (GPFEM) to predict the microstructural behaviour using experimentally determined mechanical properties [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

A Fresh Perspective on Medium Entropy Alloys Applications as Coating and Coating Substrate

Nartita¹,

Ioniță²,

Demetrescu³

et al. 2022

AnnalsARSciPhysChem

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In order to evolve as a society we need increasingly efficient technologies and implicitly materials with great performance that promote safety and sustainability. The discovery of high entropy alloys was received with much enthusiasm due to the possibility of designing new materials with improved properties, that could be used in applications that require extreme conditions or a very specific combination of properties. As the research in this area is continuously increasing and the results are very promising, this review focuses on the most recent investigations on medium entropy alloys (MEAs) applications, highlighting their properties, but taking into consideration other factors, such as economic and environmental factors. Additionally, considering the high cost associated with MEAs fabrication, MEA coatings are also explored, as they are nowadays regarded as a more convenient procedure to obtain the required properties for various substrate materials.

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Cuboid-like nanostructure strengthened equiatomic Ti–Zr–Nb–Ta medium entropy alloy

Cited by 38 publications

References 42 publications

Preparation and Microstructure of High-Activity Spherical TaNbTiZr Refractory High-Entropy Alloy Powders

Preparation and Microstructure of High-Activity Spherical TaNbTiZr Refractory High-Entropy Alloy Powders

Alloying Effect on Elastic and Mechanical Properties of Refractory Medium-Entropy Alloys from First-Principles Calculations

A Fresh Perspective on Medium Entropy Alloys Applications as Coating and Coating Substrate

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