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赵彬,朱德智.增强体形貌对高熵合金增强铸铝合金组织及性能的影响[J].稀有金属材料与工程(英文),2019,48(12):4004~4009.[Zhao Bin and Zhu Dezhi.Effect of reinforcement morphology on microstructure and properties of high-entropy alloy particles reinforced cast aluminum alloy[J].Rare Metal Materials and Engineering,2019,48(12):4004~4009.]
Effect of reinforcement morphology on microstructure and properties of high-entropy alloy particles reinforced cast aluminum alloy
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Received:October 10, 2018  Revised:November 19, 2018
DOI:
Key words: Cast aluminum alloy  High-entropy alloy  Microstructure  Properties
Foundation item:工信部绿色制造系统集成项目(2017(No.83));中央高校基本科研业务费项目(2018MS47);江西省重点研发计划项目( 20171ACH80012);佛山市科技创新项目(2016AG101761);广东省自然科学基金( 2018A010103006)。
Author NameAffiliation
Zhao Bin and Zhu Dezhi  
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Abstract:
      In this paper, two morphological high-entropy alloy particles (Al0.25Cu0.75FeCoNi) were prepared by mechanical alloying. One is ellipsoidal particles (average particle size 53μm, no control agent), the other is flake particles (average particle size 15μm, with control agent). High-entropy alloy particles reinforced cast aluminum alloy (volume 5 vol.%) were prepared by squeeze casting. The influence of different reinforcement morphology on the microstructure and mechanical properties in composite was analyzed. The results show that in preparation for precast block, ellipsoidal ones are easily mixed uniformly with aluminum powder, while the flake are prone to agglomeration. The tensile strength of the ellipsoidal and the flake particles reinforced composites reached 162 MPa and 174 MPa, respectively, which was 12.5% and 20.8% higher than that of matrix alloy, but the elongation was significantly lower. Fracture analysis showed that the fracture of ellipsoidal particles reinforced composite was dominated by the tear of the matrix, while the flake particles reinforced composite was dominated by the rupture of agglomeration.