The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti35Zr30V10Nb25 Refractory High-Entropy Alloy

Wang, Xinggang; Sun, Meng; Liu, Jiaxin; Liu, Xueqing; Jiang, Weibin; Wang, Xianping; Fang, Qianfeng

doi:10.3390/cryst14121029

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The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti₃₅Zr₃₀V₁₀Nb₂₅ Refractory High-Entropy Alloy

by

Xinggang Wang

^1,2,

Meng Sun

^1,*

,

Jiaxin Liu

^1,2,

Xueqing Liu

¹,

Weibin Jiang

¹,

Xianping Wang

^1,* and

Qianfeng Fang

¹

Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

²

Science Island Branch, Graduate School of University of Science and Technology of China, Hefei 230026, China

^*

Authors to whom correspondence should be addressed.

Crystals 2024, 14(12), 1029; https://doi.org/10.3390/cryst14121029

Submission received: 14 November 2024 / Revised: 22 November 2024 / Accepted: 26 November 2024 / Published: 27 November 2024

(This article belongs to the Special Issue Advances of High Entropy Alloys)

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Abstract

The addition of oxygen or nitrogen in refractory high-entropy alloys (HEAs) has been widely reported, but studies on boron-doped HEAs have mainly focused on the segregation of boron elements at grain boundaries. The changes in the microstructure and mechanical properties in TiZrNb-based HEAs remain enigmatic. In this work, boron-doped Ti₃₅Zr₃₀V₁₀Nb₂₅ (Ti35-xB) refractory HEAs were designed to elucidate their microstructural evolution and mechanical properties. Unlike oxygen and nitrogen, trace amounts of boron addition result in the formation of borides, and boron exhibits a strong repulsion towards Zr, leading to Zr-depleted borides. Borides distributed along the grain boundaries refine the grain size and dendritic structure. The borides and structural refinement effect enhance the strain-hardening capacity and uniform elongation, resulting in an over 15% uniform elongation for Ti35-0.25B.

Keywords: refractory HEAs; boron; microstructure; mechanical properties

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MDPI and ACS Style

Wang, X.; Sun, M.; Liu, J.; Liu, X.; Jiang, W.; Wang, X.; Fang, Q. The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti₃₅Zr₃₀V₁₀Nb₂₅ Refractory High-Entropy Alloy. Crystals 2024, 14, 1029. https://doi.org/10.3390/cryst14121029

AMA Style

Wang X, Sun M, Liu J, Liu X, Jiang W, Wang X, Fang Q. The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti₃₅Zr₃₀V₁₀Nb₂₅ Refractory High-Entropy Alloy. Crystals. 2024; 14(12):1029. https://doi.org/10.3390/cryst14121029

Chicago/Turabian Style

Wang, Xinggang, Meng Sun, Jiaxin Liu, Xueqing Liu, Weibin Jiang, Xianping Wang, and Qianfeng Fang. 2024. "The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti₃₅Zr₃₀V₁₀Nb₂₅ Refractory High-Entropy Alloy" Crystals 14, no. 12: 1029. https://doi.org/10.3390/cryst14121029

APA Style

Wang, X., Sun, M., Liu, J., Liu, X., Jiang, W., Wang, X., & Fang, Q. (2024). The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti₃₅Zr₃₀V₁₀Nb₂₅ Refractory High-Entropy Alloy. Crystals, 14(12), 1029. https://doi.org/10.3390/cryst14121029

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The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti₃₅Zr₃₀V₁₀Nb₂₅ Refractory High-Entropy Alloy

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