高熵合金跨尺度异构强韧化及其力学性能研究进展

安子冰, 毛圣成, 张泽, 韩晓东

Strengthening-Toughening Mechanism and Mechanical Properties of Span-Scale Heterostructure High-Entropy Alloy

AN Zibing, MAO Shengcheng, ZHANG Ze, HAN Xiaodong

图3 (HfNbTiZr)₉₈O₂高熵合金显微结构及力学性能^[56]

Fig.3 Microstructure and mechanical properties of (HfNbTiZr)₉₈O₂ high-entropy alloy^[56] (O-2 represents (TiZrHfNb)₉₈O₂, and N-2 represents (TiZrHfNb)₉₈N₂)
(a) atom probe tomography image and the O composition profile as a function of the distance to the interface for a selection of particles (left axis) and evolution of the composition of the main constituents relative to their respective matrix composition (right axis) (N_i is the number of the ith atom, while C_i and C_i_{, matrix} are the concentrations of the ith atom in the ordered oxygen complexes (OOCs) and in the matrix, respectively; and the inset shows a close-up of one OOC)
(b) TEM image of O-2 HEA at 8% tensile strain (The red arrows indicate the dipolar walls)
(c) tensile mechanical properties of the (HfNbTiZr)₉₈O₂ alloy and compared alloys (σ_y is the yield strength (squares), σ_UTS is the ultimate strength (diamonds), and ε is the elongation (circles). The inset shows the corresponding strain-hardening response (dσ/dε))