Microstructure and Mechanical Properties of Homogenized AlxCrNbTiV (x=0.2,0.5,0.8) Refractory High Entropy Alloy

Authors

  • Haidong Chen

DOI:

https://doi.org/10.54097/ajst.v4i3.4798

Keywords:

Refractory high-entropy alloy, Annealing, Microstructure, Mechanical properties.

Abstract

A new lightweight refractory high-entropy alloy AlxCrNbTiV (x=0.2; 0.5; 0.8) was prepared by vacuum arc melting method, and the changes in the microstructure and mechanical properties of the alloy after homogenization annealing at 1200°C for 24h were analyzed. The results shew that the homogenized AlxCrNbTiV alloy consists of a biphasic structure of BCC solid solution phase and C14 Laves phase, and the volume fraction of C14 Laves phase decreases with the increase of Al content and is not uniformly distributed. The alloy microhardness increased with increasing Al content, from 610HV for Al0.2CrNbTiV alloy to 673HV for Al0.8CrNbTiV alloy. Meanwhile, the yield strength decreased from 1705MPa to 1249MPa, the compressive strain decreased from 17.8% to 12.9%, and the brittleness increased with increasing Al content.

Downloads

Download data is not yet available.

References

Yeh J W, Chen S K, Lin S J, et al. Nanostructured high-entropy alloys with multiple principal elements: novel alloy design concepts and outcomes[J]. Adv. Eng. Mater., 2004, 6: 299.

Zhang Y, Zuo T T, Tang Z, et al. Microstructures and properties of high-entropy alloys[J]. Prog. Mater. Sci., 2014, 61: 1.

Miracle D B, Senkov O N. A critical review of high entropy alloys and related concepts[J]. Acta Mater., 2017, 122: 448.

Tsai K Y, Tsai M H, Yeh J W. Sluggish diffusion in Co-Cr-Fe-Mn-Ni high-entropy alloys[J]. Acta Mater., 2013, 61: 4887.

Tang Z, Yuan T, Tsai C W, et al. Fatigue behavior of a wrought Al0.5CoCrCuFeNi two-phase high-entropy alloy[J]. Acta Mater., 2015, 99: 247.

Senkov O N, Wilks G B, Scott J M, et al. Mechanical properties of Nb25Mo25Ta25W25 and V20Nb20Mo20Ta20W20 refractory high entropy alloys[J]. Intermetallics, 2011, 19: 698.

Senkov O N, Wilks G B, Miracle D B, et al. Refractory high-entropy alloys[J]. Intermetallics, 2010, 18: 1758.

Downloads

Published

08-02-2023

Issue

Section

Articles

How to Cite

Microstructure and Mechanical Properties of Homogenized AlxCrNbTiV (x=0.2,0.5,0.8) Refractory High Entropy Alloy. (2023). Academic Journal of Science and Technology, 4(3), 77-79. https://doi.org/10.54097/ajst.v4i3.4798

Similar Articles

1-10 of 348

You may also start an advanced similarity search for this article.