期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 786, 期 -, 页码 139-148出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.01.341
关键词
High-entropy alloy; Mechanical alloying; Spark plasma sintering; Mechanical properties; Thermal analysis
资金
- [0109U001776]
- [0115U000405]
- [0116U006097]
The phase and structural transformations in equiatomic powder compositions of the Al-Cu-Ni-Fe-Cr system during mechanical alloying (MA), annealing and subsequent spark plasma sintering (SPS) had been studied by X-ray diffraction analysis, scanning and transmission electron microscopy, and differential scanning calorimetry. It has been established that the nanocrystalline high-entropy AICuNiFeCr alloy synthesized during MA consists of a supersaturated solid solution with a bcc crystalline structure. After annealing and spark plasma sintering at 800 degrees C, the alloy becomes three-phased, and consists mainly of one B2-ordered solid solution, one fcc solid solution (25 wt %), and of the (Cr, Fe)(23)C-6 phase (8 wt %). The Vickers hardness of the sintered AICuNiFeCr alloy was 8.35 GPa, and the compressive strength at room temperature reached 1960 MPa. (C) 2019 Elsevier B.V. All rights reserved.
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