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Effect of Ti content on microstructure and properties of TixZrVNb refractory high-entropy alloys
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Effect of Ti content on microstructure and properties of TixZrVNb refractory high-entropy alloys
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Journal Article
Effect of Ti content on microstructure and properties of TixZrVNb refractory high-entropy alloys
2020
Overview
This study aimed to investigate the microstructure and mechanical properties of Ti
x
ZrVNb (
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 V
2
Zr phase. The Ti
1.5
ZrVNb and Ti
2
ZrVNb 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
x
ZrVNb 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
x
ZrVNb alloys displayed low densities but high specific yield strengths (SYSs). The lowest density of Ti
x
ZrVNb alloys was only 6.12 g/cm
3
, but the SYS could reach about 180 MPa·cm
3
·g
−1
, which is better than those of most reported high-entropy alloys (HEAs).
Publisher
University of Science and Technology Beijing,Springer Nature B.V,Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian Uni-versity of Technology, Dalian 116024, China%College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China
