共晶高熵合金十年发展回顾(2014—2024)：设计、制备与应用

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WANG Zhijun, BAI Xiaoyu, WANG Jianbin, JIANG Hui, JIAO Wenna, LI Tianxin, LU Yiping

图5 具有不同微观组织的共晶高熵合金的力学性能[48,50~54]

Fig.5 Mechanical properties of EHEAs with different microstructures (a) directionally solidified Al19Fe20Co20Ni41 EHEA with herringbone-like microstructure (Inset shows the strain-hardening rate curves. MDIH and MBIH refer to multi-slip dislocation-induced hardening and microband-induced hardening, respectively; εU—uniform strain; σy—yield strength of Al19Fe20Co20Ni41 EHEA; σUTS—ultimate tensile strength of Al19Fe20Co20Ni41 EHEA)[48] (b) as-printed and annealed AlCoCrFeNi2.1 EHEA with ultrafine nanolamellar structure (Inset shows the schematic of a dogbone-shaped specimen under tensile loading. σu—ultimate tensile strength of AlCoCrFeNi2.1 EHEA; σ0.2—yield strength of AlCoCrFeNi2.1 EHEA)[50] (c) additive manufactured Ni32Co30Cr10Fe10Al18 EHEA with anomalous eutectic structure[51] (d) ultrafine-grained AlCoCrFeNi2.1 EHEA (CR—cold rolling)[53] (e) heterogeneous-grained AlCoCrFeNi2.1 EHEA (Inset shows the loading-unloading-reloading behavior of the DPHL700 and the as-cast EHEA, DPHL—dual-phase heterogeneous lamella, UFG EHEA—ultrafine-grain EHEA, CH EHEA—complex and hierarchical EHEA)[52] (f) phase-selectively recrystallized Ni30Co30Cr10Fe10Al18W2 EHEA (AC—as-cast, FR—fully recrystallization, PSR—phase-selective recrystallization)[54]