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首页> 外文期刊>Materials Science and Engineering >Microstructural evolution and mechanical properties of non-Cantor AlCuSiZnFe lightweight high entropy alloy processed by advanced powder metallurgy
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Microstructural evolution and mechanical properties of non-Cantor AlCuSiZnFe lightweight high entropy alloy processed by advanced powder metallurgy

机译：非CANTOR ALCUSIZNFE轻质高熵合金的微观结构演化与机械性能通过先进的粉末冶金加工

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摘要

In this study, multicomponent AlCuSiZnFe high entropy alloy (HEA) was fabricated through high energy ball milling (HEBM) of constituent powders, and further densification via spark plasma sintering (SPS). The results show the presence of a predominant face-centered cubic (FCC) phase with a minor body-centered cubic (BCC) phase in (45 h) HEBMed powders which further develop according to the SPS treatment. At a low SPS temperature of 600 °C, the alloying of individual elements was poor. Further, at 650 °C, alloying improves and the liquid Cu-Zn FCC phase separates from the high-temperature Fe-Si-rich BCC phase during SPS. At 700 °C, Al was noticed to stabilize the BCC phase leaving behind soft FCC (Cu-Zn). Further increase in SPS temperature to 800 °C causes a complete melting of HEA compacts and the formation of Cu-Al intermetallic compounds (IMCs). The microhardness of the HEA compacts increases with SPS temperature in the range of 690-974 HV. The compressive properties were found to be optimum at 650 °C, compressive strength ≈ 1987 MPa and elastic modulus ≈27,945 MPa respectively. The measured densities of HEAs varied from 4.98 to 5.24 g/cm~3, comparable to the heaviest of lightweight Ti alloys reported so far.
机译：在该研究中，通过组分粉末的高能量球磨（Hebm）制造多组分Alcusiznfe高熵合金（Hea），并通过火花等离子体烧结（SPS）进一步致密化。结果表明，在（45h）HEBMed粉末中具有次要体上的立方（BCC）相的主要面向立方（FCC）相的存在，其根据SPS处理进一步开发。在600°C的低SPS温度下，各个元素的合金化差。此外，在650℃下，合金化改善和液体Cu-Zn FCC相在SP期间与高温Fe-Si的BCC相分离。在700℃下，注意到Al以稳定留下软FCC（Cu-Zn）后的BCC阶段。 SPS温度的进一步增加至800℃导致Hea紧凑的完全熔化和Cu-Al金属间化合物（IMC）的形成。 HEA紧凑型的显微硬度随SPS温度的增加，范围为690-974HV。发现压缩性能在650℃，压缩强度≈1987MPa和弹性模量分别为650℃，分别为≈27,945MPa。 HEA的测量密度从4.98到5.24g / cm〜3不同，与到目前为止所报告的重量级Ti合金相当。

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  • 来源
    《Materials Science and Engineering》 |2020年第21期|140066.1-140066.12|共12页
  • 作者

    Ashutosh Sharma; Min Chul Oh; Byungmin Ahn;

  • 作者单位

    Department of Materials Science and Engineering Ajou University Simon Gyeonggi-do 16499 South Korea Department of Energy Systems Research Ajou University Suwon Gyeonggi-do 16499 South Korea;

    Metals Forming Technology R&D Group Korea Institute of Industrial Technology Incheon 21999 South Korea;

    Department of Materials Science and Engineering Ajou University Simon Gyeonggi-do 16499 South Korea Department of Energy Systems Research Ajou University Suwon Gyeonggi-do 16499 South Korea;

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  • 正文语种 eng
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  • 关键词

    High entropy alloys; Lightweight alloys; Powder metallurgy; Spark plasma sintering; Microstructure;

    机译：高熵合金;轻质合金;粉末冶金;火花等离子烧结;微观结构;

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