| 1 | High-temperature ultra-strength of dual-phase Re_(0.5)MoNbW(TaC)_(0.5) high-entropy alloy matrix composite显示文摘The dual-phase Re_(0.5)MoNbW(TaC)_(0.5) composite,consisting of refractory body-centered cubic(BCC)highentropy 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 ascast composite were studied.The microstructure of the composite remained stable after annealing at 1300℃for 168 h.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. | Qinqin Wei Guoqiang Luo RongTu Jian Zhang Qiang Shen Yujie Cui Yunwei Gui Akihiko Chiba | 2021 | Journal of Materials Science & Technology2021，，25： | 4 |
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