TY - JOUR
T1 - High-temperature ultra-strength of dual-phase Re0.5MoNbW(TaC)0.5 high-entropy alloy matrix composite
AU - Wei, Qinqin
AU - Luo, Guoqiang
AU - Tu, Rong
AU - Zhang, Jian
AU - Shen, Qiang
AU - Cui, Yujie
AU - Gui, Yunwei
AU - Chiba, Akihiko
N1 - Funding Information:
This work was supported by the State Key Program of National Natural Science Foundation of China [Grant No. 51932006 ]; National Natural Science Foundation of China [Grant No. 51521001 ]; the “111” Project [Grant No. B13035]; the Joint Fund [Grant No. 6141A02022255 ]; and the major program of specialized technological innovation of Hubei Province, China [Grant No. 2019AFA176 ]. Q. Wei also appreciates the support from China Scholarship Council (No. 201906950060 ).
Publisher Copyright:
© 2021
PY - 2021/9/10
Y1 - 2021/9/10
N2 - The dual-phase Re0.5MoNbW(TaC)0.5 composite, consisting of refractory body-centered cubic (BCC) high-entropy alloy and carbide with many fine eutectic structures, was successfully synthesized by arc melting. The phase stability, high-temperature mechanical properties and strengthening mechanism of the as-cast composite were studied. The microstructure of the composite remained stable after annealing at 1300℃ for 168h. It exhibited remarkably high-temperature strength, yield strength ∼ 901 MPa, and true ultimate compressive strength ∼ 1186 MPa at 1200℃. The BCC phase and carbide exhibited a semi-coherent interface with good bonding after severe deformation at 1200℃. The dipolar dislocation walls in BCC phase, restricted dynamic interaction between defects in carbide, and the pinning effect of semi-coherent interface offered effective strengthening effects.
AB - The dual-phase Re0.5MoNbW(TaC)0.5 composite, consisting of refractory body-centered cubic (BCC) high-entropy alloy and carbide with many fine eutectic structures, was successfully synthesized by arc melting. The phase stability, high-temperature mechanical properties and strengthening mechanism of the as-cast composite were studied. The microstructure of the composite remained stable after annealing at 1300℃ for 168h. It exhibited remarkably high-temperature strength, yield strength ∼ 901 MPa, and true ultimate compressive strength ∼ 1186 MPa at 1200℃. The BCC phase and carbide exhibited a semi-coherent interface with good bonding after severe deformation at 1200℃. The dipolar dislocation walls in BCC phase, restricted dynamic interaction between defects in carbide, and the pinning effect of semi-coherent interface offered effective strengthening effects.
KW - Composite
KW - Eutectic structure
KW - High-entropy alloy
KW - Strength
KW - Strengthening mechanism
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U2 - 10.1016/j.jmst.2020.12.015
DO - 10.1016/j.jmst.2020.12.015
M3 - Article
AN - SCOPUS:85100654363
SN - 1005-0302
VL - 84
SP - 1
EP - 9
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
ER -