Microstructures and mechanical properties of Ti NbMoTaW refractory high-entropy alloys

Han, Zhiqiang; Luan, Hengwei; Liu, Xiaohua; Chen, N.; Li, X.Y.; Shao, Yang; Yao, Kefu

doi:10.1016/j.msea.2017.12.004

Cited by 251 publications

(62 citation statements)

References 44 publications

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“…Table 1 of the data sheet illustrates the collected data from published studies so far [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] , [46] , [47] , [48] , [49] , [50] , [51] , [52] , [53] , [54] , [55] , [56] , for all the RHEAs / RCCAs: the alloy composition . Alloying elements are classified by alphabetic order and the subscripts indicate atom mole fraction.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Comprehensive data compilation on the mechanical properties of refractory high-entropy alloys

et al. 2018

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This data article presents the compilation of mechanical properties for 122 refractory high entropy alloys (RHEAs) and refractory complex concentrated alloys (RCCAs) reported in the period from 2010 to the end of January 2018. The data sheet gives alloy composition, type of microstructures and the metallurgical states in which the properties are measured. Data such as the computed alloy mass density, the type of mechanical loadings to which they are subjected and the corresponding macroscopic mechanical properties, such as the yield stress, are made available as a function of the testing temperature. For practical use, the data are tabulated and some are also graphically presented, allowing at a glance to access relevant information for this attractive category of RHEAs and RCCAs.

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Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Comprehensive data compilation on the mechanical properties of refractory high-entropy alloys

et al. 2018

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“…Studies have shown that at 1600 °C, NbMoTaW RHEA has a higher yield strength than the Inconel 718 and Haynes 230 alloys, which can reach 405 MPa [ 3 ]. Deriving from this alloying design strategy, a series of RHEAs have been developed, such as MoNbTaV [ 4 ], VNbMoTaW [ 3 ], and NbMoTaWTi [ 5 ]. These RHEAs are considered backup alloys for high-temperature structural materials.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of TaNbVTiAlx Refractory High-Entropy Alloys

Guo

Liu

et al. 2020

Entropy

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A series of TaNbVTiAlx (x = 0, 0.2, 0.4, 0.6, 0.8, and 1.0) refractory high-entropy alloys (RHEAs) with high specific strength and reasonable plasticity were prepared using powder metallurgy (P/M) technology. This paper studied their microstructure and compression properties. The results show that all the TaNbVTiAlx RHEAs exhibited a single BCC solid solution microstructure with no elemental segregation. The P/M TaNbVTiAlx RHEAs showed excellent room-temperature specific strength (207.11 MPa*cm3/g) and high-temperature specific strength (88.37 MPa*cm3/g at 900 °C and 16.03 MPa*cm3/g at 1200 °C), with reasonable plasticity, suggesting that these RHEAs have potential to be applied at temperatures >1200 °C. The reasons for the excellent mechanical properties of P/M TaNbVTiAl0.2 RHEA were the uniform microstructure and solid solution strengthening effect.

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“…Refractory high-entropy alloys (RHEAs) are considered to be a new generation of high-temperature materials, because they have the advantages of both high-entropy alloys (HEAs) and refractory metals (RMs), such as high-temperature strength, high hardness, and good phase stability at high temperatures [1][2][3][4][5][6][7]. They are mainly composed of Mo, Nb, Ta, and W, while Ti, Cr, V, Si, and Al are usually used as strengthening alloy elements [8][9][10][11][12][13][14]. For example, Mo 25 Nb 25 Ta 25 W 25 and Mo 20 Nb 20 Ta 20 W 20 V 20 are two of the types of most extensively studied RHEAs [7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Composition Evolution of a Fused Slurry Silicide Coating on MoNbTaTiW Refractory High-Entropy Alloy in High-Temperature Oxidation Environment

Han

Zhang

et al. 2020

Materials

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In this paper, the Si-20Cr-20Fe coating was prepared on MoNbTaTiW RHEA by a fused slurry method. The microstructural evolution and compositions of the silicide coating under high-temperature oxidation environment were studied. The results show that the silicide coating could effectively prevent the oxidation of the MoNbTaTiW RHEA. The initial silicide coating had a double-layer structure: a high silicon content layer mainly composed of MSi2 as the outer layer and a low silicon content layer mainly contained M5Si3 as the inner layer. Under high-temperature oxidation conditions, the silicon element diffused from the silicide coating to the RHEA substrate while the oxidation of the coating occurred. After oxidation, the coating was composed of an outer oxide layer and an inner silicide layer. The silicide layer moved toward the inside of the substrate, led to the increase of its thickness. Compared with the initial silicified layer, its structure did not change significantly. The structure and compositions of the oxide layer on the outer surface strongly depended on the oxidation temperature. This paper provides a strategy for protecting RHEAs from oxidation at high-temperature environments.

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Microstructures and mechanical properties of Ti NbMoTaW refractory high-entropy alloys

Cited by 251 publications

References 44 publications

Comprehensive data compilation on the mechanical properties of refractory high-entropy alloys

Comprehensive data compilation on the mechanical properties of refractory high-entropy alloys

Microstructure and Mechanical Properties of TaNbVTiAlx Refractory High-Entropy Alloys

Microstructure and Composition Evolution of a Fused Slurry Silicide Coating on MoNbTaTiW Refractory High-Entropy Alloy in High-Temperature Oxidation Environment

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