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Effect of Ti content on microstructure and properties of Ti x ZrVNb refractory high-entropy alloys
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-08-27 , DOI: 10.1007/s12613-020-2040-1
Tian-dang Huang , Shi-yu Wu , Hui Jiang , Yi-ping Lu , Tong-min Wang , Ting-ju Li

This study aimed to investigate the microstructure and mechanical properties of TixZrVNb (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 Ti1.5ZrVNb 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 TixZrVNb 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 TixZrVNb alloys displayed low densities but high specific yield strengths (SYSs). The lowest density of TixZrVNb 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).



中文翻译:

Ti含量对Ti x ZrVNb难熔高熵合金组织和性能的影响

这项研究旨在研究Ti x ZrVNb(x = 1,1.5,2 )难熔高熵合金在室温和高温下的组织和力学性能。TiZrVNb合金由具有少量V 2 Zr相的体心立方(BCC)基体组成。Ti 1.5 ZrVNb和Ti 2 ZrVNb合金表现出单相BCC结构。在室温下,随着Ti含量的增加,铸态合金的拉伸延性从3.5%增加到12.3%。钛XZrVNb合金在600°C时表现出高屈服强度,极限屈服强度超过900 MPa。在800°C时发生软化,但最终屈服强度仍可能超过200 MPa。而且,Ti x ZrVNb合金显示出低密度,但具有较高的比屈服强度(SYSs)。Ti x ZrVNb合金的最低密度仅为6.12 g / cm 3,但SYS可以达到约180 MPa·cm 3 ·g -1,比大多数报道的高熵合金(HEA)更好。

更新日期:2020-08-28
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