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,2019,48(12):4004~4009.[Zhao Bin,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.]
增强体形貌对高熵合金增强铸铝合金组织及性能的影响
投稿时间:2018-10-10  修订日期:2018-11-19
中文关键词:  铸造铝合金  高熵合金  微观组织  性能
基金项目: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)。
中文摘要:
      本文采用机械合金化工艺制备了两种不同形貌特征的高熵合金(Al0.25Cu0.75FeCoNi)颗粒,一种为椭球状颗粒(平均粒径为53μm,无过程控制剂);另一种为片状颗粒(平均粒径15μm,有过程控制剂)。采用挤压铸造工艺制备了低体积分数(颗粒含量为5 vol.%)的高熵合金颗粒增强铸造铝合金材料,重点分析了不同增强相形貌对复合材料的组织和力学性能的影响规律。结果表明:在复合材料预制块制备过程中,椭球状高熵合金粉体与铝粉容易混合均匀,而片状高熵合金粉体之间易发生团聚。椭球状颗粒与片状颗粒增强的复合材料的抗拉强度分别达到162MPa和174MPa,比铸铝合金实验基体分别提升了12.5%和 20.8%,但伸长率较铸铝合金基体却发生了明显下降。断口分析表明,椭球状颗粒增强复合材料的断裂以基体的撕裂为主;而片状颗粒增强复合材料则以团聚颗粒的破裂为主。
Effect of reinforcement morphology on microstructure and properties of high-entropy alloy particles reinforced cast aluminum alloy
英文关键词:Cast aluminum alloy  High-entropy alloy  Microstructure  Properties
英文摘要:
      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.
作者单位E-mail
赵彬 华南理工大学 1165940548@qq.com 
朱德智 华南理工大学 mezhudz@scut.edu.cn 
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