Effect of V and Ti on the Oxidation Resistance of WMoTaNb Refractory High-Entropy Alloy at High Temperatures

Lu, Shilei; Li, Xiaoxiao; Liang, Xiaoyu; Yang, Wei; Chen, Jian

doi:10.3390/met12010041

Cited by 13 publications

(3 citation statements)

References 26 publications

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“…High interest and a great number of studies have recently focused on this class of alloys [1,[3][4][5][6][7][8]. They exhibit remarkable mechanical properties up to 1000 • C and above, and can therefore be considered a valid substitution for Ni-based superalloys as new high-temperature structural materials [9][10][11][12][13]. Refractory HEAs can possess either a single-phase bcc/B2 structure or multi-phase structures in which some intermetallic compounds are dispersed in the bcc/B2 matrix [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Production of a Reinforced Refractory Multielement Alloy via High-Energy Ball Milling and Spark Plasma Sintering

Menapace

Shaik

Emanuelli

et al. 2023

Metals

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Refractory high entropy alloys have shown potential to be developed as structural materials for elevated temperature applications. In the present research, the multielement alloy Fe2TiVZrW0.5 was produced by high-energy ball milling of elemental powders in the air to promote the formation of reinforcing oxide and nitride particles followed by spark plasma sintering consolidation. The sintering temperature was optimized to achieve a full-density material that was characterized from the microstructural and mechanical points of view. Hardness and KIC were measured in the as-sintered condition as well as after thermal treatment at 1100 °C. TEM observations showed the presence of a fine distribution of ZrO2 and Ti(V)-N in the microstructure mainly constituted by the bcc Fe-V and Fe-V-W phases. The fine distribution of ceramic particles in a metallic multielement matrix is responsible for the consistent hardness and thermal stability of this alloy.

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Section: Introductionmentioning

confidence: 99%

Production of a Reinforced Refractory Multielement Alloy via High-Energy Ball Milling and Spark Plasma Sintering

Menapace

Shaik

Emanuelli

et al. 2023

Metals

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show abstract

“…Based on elemental composition, HEAs possess a controllable structure and excellent performance, such as high-temperature stability, low-temperature toughness, and superior corrosion resistance [8][9][10][11][12][13][14]. Combined with the design concept of HEAs and properties of W alloys, some refractory HEAs, such as WMoNbTa and WMoN-bVTa, have been developed [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Near-Equiatomic μ Phase in Self-Sharpening Tungsten-Based High-Entropy Alloys

Liu

Dai

2022

Metals

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The topologically close-packed (TCP) μ phase is usually known as an undesirable precipitation in highly alloyed Ni-base superalloys and steels. However, the ultrastrong μ phase with micron/nano-scale distribution plays a key role in driving the emergence of self-sharpening in our recently developed WMoFeNi high-entropy alloy (HEA). Herein, a detailed study is carried out to understand the substructure and atomic occupation of the μ phase by scanning electron microscope (SEM) and aberration-corrected transmission electron microscope (ACTEM). The Fe/Ni and W/Mo element pairs are equivalent in the μ-phase structure. Moreover, the elements in μ phase exhibit a near-equiatomic ratio, and the μ phase can grow during annealing at 1150 °C. (0001)μ and (11¯02)μ. Twins are the main substructures of the μ phase, and their atomic configurations and twinning mechanisms are investigated. The geometrical structural analysis of μ phase possesses a great significance for the design of self-sharpening HEAs.

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“…The paper by Shuaidan Lu et al [6] studies how V and Ti additions affect the oxidation behavior of WMoTaNb RHEA at 1000 • C. The reported results clearly indicate that the additions of V and Ti do not improve the resistance of WMoTaNb. In particular, the effect of V is harmful to the overall behavior, as it tends to deteriorate the oxide volatility, leading to dramatic internal oxidation.…”

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confidence: 98%