Effect of Al content on structure and mechanical properties of the AlxCrNbTiVZr (x=0; 0.25; 0.5; 1) high-entropy alloys
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National Science Center Kharkov Institute of Physics and Technology NAS of Ukraine, Kharkov, 61108, Ukraine.
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Publication type: Journal Article
Publication date: 2016-11-01
scimago Q1
wos Q1
SJR: 1.338
CiteScore: 8.2
Impact factor: 5.5
ISSN: 10445803, 18734189
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
In present study, structure and mechanical properties of the AlxCrNbTiVZr (x = 0; 0.25; 0.5; 1) high-entropy alloys after arc melting and annealing at 1200 °C for 24 h are investigated. The CrNbTiVZr alloy is composed of body centered cubic (bcc) and C15 (face centered cubic) Laves phases while the AlxCrNbTiVZr (x = 0.25; 0.5; 1) alloys consist of bcc and two C14 (hexagonal close packed) Laves phases with different chemical compositions. Thermodynamic modeling predicts existence of two phases – bcc and C15 Laves phase and broadening of single bcc phase field due to Al addition. The density of the alloys decreases with the increase of Al content. The alloys are found to be extremely brittle at room temperature and 600 °C. The alloys have high strength at temperatures of 800–1000 °C. For example, yield strength at 800 °C increases from 440 MPa for the CrNbTiVZr alloy to 1250 MPa for the AlCrNbTiVZr alloy. The experimental phase composition of the AlxCrNbTiVZr alloys is compared with predicted equilibrium phases and the factors governing the transformation of C15 to C14 Laves phases due to Al addition to the CrNbTiVZr alloy analyzed. Specific properties of the alloys are compared with other high-entropy alloys and commercial Ni-based superalloys.
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Yurchenko N. et al. Effect of Al content on structure and mechanical properties of the AlxCrNbTiVZr (x=0; 0.25; 0.5; 1) high-entropy alloys // Materials Characterization. 2016. Vol. 121. pp. 125-134.
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Yurchenko N., Stepanov N., Shaysultanov D., Tikhonovsky M., Salishchev G. Effect of Al content on structure and mechanical properties of the AlxCrNbTiVZr (x=0; 0.25; 0.5; 1) high-entropy alloys // Materials Characterization. 2016. Vol. 121. pp. 125-134.
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TY - JOUR
DO - 10.1016/j.matchar.2016.09.039
UR - https://doi.org/10.1016/j.matchar.2016.09.039
TI - Effect of Al content on structure and mechanical properties of the AlxCrNbTiVZr (x=0; 0.25; 0.5; 1) high-entropy alloys
T2 - Materials Characterization
AU - Yurchenko, Nikita
AU - Stepanov, Nikita
AU - Shaysultanov, Dmitry
AU - Tikhonovsky, M.A
AU - Salishchev, Gennady
PY - 2016
DA - 2016/11/01
PB - Elsevier
SP - 125-134
VL - 121
SN - 1044-5803
SN - 1873-4189
ER -
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@article{2016_Yurchenko,
author = {Nikita Yurchenko and Nikita Stepanov and Dmitry Shaysultanov and M.A Tikhonovsky and Gennady Salishchev},
title = {Effect of Al content on structure and mechanical properties of the AlxCrNbTiVZr (x=0; 0.25; 0.5; 1) high-entropy alloys},
journal = {Materials Characterization},
year = {2016},
volume = {121},
publisher = {Elsevier},
month = {nov},
url = {https://doi.org/10.1016/j.matchar.2016.09.039},
pages = {125--134},
doi = {10.1016/j.matchar.2016.09.039}
}