Effect of Ti content on microstructure and properties of Ti<sub><i>x</i></sub>ZrVNb refractory high-entropy alloys

Tian-dang Huang; Shi-yu Wu; Hui Jiang; Yi-ping Lu; Tong-min Wang; Ting-ju Li

doi:10.1007/s12613-020-2040-1

Volume 27 Issue 10

Oct. 2020

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2020 > 27(10): 1318-1325

Tian-dang Huang, Shi-yu Wu, Hui Jiang, Yi-ping Lu, Tong-min Wang, and Ting-ju Li, Effect of Ti content on microstructure and properties of Ti_xZrVNb refractory high-entropy alloys, Int. J. Miner. Metall. Mater., 27(2020), No. 10, pp. 1318-1325. https://doi.org/10.1007/s12613-020-2040-1

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Tian-dang Huang, Shi-yu Wu, Hui Jiang, Yi-ping Lu, Tong-min Wang, and Ting-ju Li, Effect of Ti content on microstructure and properties of TixZrVNb refractory high-entropy alloys, Int. J. Miner. Metall. Mater., 27(2020), No. 10, pp. 1318-1325. https://doi.org/10.1007/s12613-020-2040-1

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Research Article

Effect of Ti content on microstructure and properties of Ti_xZrVNb refractory high-entropy alloys

+ Author Affiliations

Corresponding author:
Yi-ping Lu E-mail: luyiping@dlut.edu.cn
Received: 27 December 2019; Revised: 29 February 2020; Accepted: 6 March 2020; Available online: 9 March 2020

Abstract

Abstract

This study aimed to investigate the microstructure and mechanical properties of Ti_xZrVNb (x = 1, 1.5, 2) refractory high-entropy alloys at room and elevated temperatures. The TiZrVNb alloy consisted of the body-centered cubic (bcc) matrix with a small amount of V₂Zr phase. The Ti_1.5ZrVNb and Ti₂ZrVNb alloys exhibited a single-phase bcc structure. At room temperature, the tensile ductility of the as-cast alloys increased from 3.5% to 12.3% with the increase in the Ti content. The Ti_xZrVNb alloys exhibited high yield strength at 600°C, and the ultimate yield strength was more than 900 MPa. Softening occurred at 800°C, but the ultimate yield strength could still exceed 200 MPa. Moreover, the Ti_xZrVNb alloys displayed low densities but high specific yield strengths (SYSs). The lowest density of Ti_xZrVNb alloys was only 6.12 g/cm³, but the SYS could reach about 180 MPa·cm³·g⁻¹, which is better than those of most reported high-entropy alloys (HEAs).
- high-entropy alloys;
- mechanical properties;
- low density;
- elevated temperature

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