A novel Hf30Nb25Ta25Ti15Mo5 refractory high entropy alloy with excellent combination of strength and ductility

Qi, Wei; Zhang, Aijun; Han, Jiesheng; Xin, Benbin; Su, Bo; Wang, Xiaochao

doi:10.1016/j.msea.2022.144035

Cited by 22 publications

(1 citation statement)

References 31 publications

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“…Due to the limited regulating composition range to optimize the alloy microstructures, the competitive advantages of the multicomponent have not yet been fully exploited. In addition, the high-strength and -toughness HEAs systems are quite limited, and the exploration of new high-strength and -toughness HEAs in broader alloy systems is still an unsolved challenge [11,12]. In these cases, it is necessary to explore non-equiatomic HEA systems to develop their latent value.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Non-Equiatomic Ni10Cr6WFe9TiAlx High-Entropy Alloys Combined with High Strength and Toughness

Yang

He²,

Li³

et al. 2023

Metals

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High-entropy alloys (HEAs) with excellent mechanical properties have broad application scope and application prospects. However, it is difficult to obtain the optimized element composition, based on the traditional equiatomic or near-equiatomic statistical analysis of the phase selection rules. The non-equiatomic HEAs have abundant constituents combination by optimizing the type and content of elements. In this study, Ni10Cr6WFe9TiAlx (x = 0, 1.0 and 1.5, at.%) HEAs were prepared by vacuum arc melting. The effect of Al content x on microstructure and mechanical properties of HEAs was systematically studied. The results show that the HEAs are composed mainly of face-centered cubic (FCC) with hexagonal Al2W phase. The increase of Al content promotes the formation of the hexagonal Al2W phase. When the Al mole content is 1.0, the Ni10Cr6WFe9TiAl HEA material has achieved superior mechanical properties. The alloy exhibited a high ultimate tensile strength of 741 MPa and a large total elongation of 46%. The improvement in the mechanical properties of the Ni10Cr6WFe9TiAl HEA is mainly attributed to the precipitation strengthening of the high-density Al2W phase. This work provides a reference for the future design of Al2W precipitation-strengthened non-equiatomic HEAs with ideal properties.

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Section: Introductionmentioning

confidence: 99%