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首页> 外文期刊>Materials Science and Engineering >Soft particles assisted grain refinement and strengthening of an Al-Bi-Zn alloy subjected to ECAP
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Soft particles assisted grain refinement and strengthening of an Al-Bi-Zn alloy subjected to ECAP

机译：软颗粒辅助进行ECAP的Al-Bi-Zn合金的晶粒细化和强化

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摘要

With the aim to improve the strength of potential Pb-free Al-Bi based bearing alloys, an Al-6Bi-8Zn alloy was subjected to equal channel angular pressing (ECAP). To reveal the roles played by the soft Bi particles, an Al-8Zn alloy is compared. After five passes of ECAP (5P), ultrafine grained (UFG) microstructures are obtained in both alloys, while most of the Bi particles are deformed into the flake shapes. The yield strength (YS) of the as-deformed Al-6Bi-8Zn sample is more than three times as that of the as-cast sample. The influence of soft Bi particles on the deformation during ECAP and the final mechanical properties of the Al-6Bi-8Zn alloy are discussed. It is revealed that soft Bi particles have a strong influence on enhancing grain refinement during ECAP. At the same time, ECAP is found to accelerate the precipitation of the P(Zn) phase along grain boundaries (GBs).
机译：为了提高潜在的无铅Al-Bi基轴承合金的强度，对Al-6Bi-8Zn合金进行了等通道角挤压（ECAP）。为了揭示软Bi颗粒的作用，对Al-8Zn合金进行了比较。经过五次ECAP（5P）处理后，两种合金均获得了超细晶粒（UFG）的显微组织，而大部分Bi粒子均变形为片状。变形后的Al-6Bi-8Zn样品的屈服强度（YS）是铸态样品的3倍以上。讨论了软Bi粒子对ECAP变形和Al-6Bi-8Zn合金最终力学性能的影响。揭示了软Bi颗粒对ECAP期间提高晶粒细化有很大影响。同时，发现ECAP加速了P（Zn）相沿晶界（GBs）的析出。

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  • 来源
    《Materials Science and Engineering》 |2017年第4期|304-313|共10页
  • 作者

    Hailong Jia; Ruben Bjørge; Knut Marthinsen; Ragnvald H. Mathiesen; Yanjun Li;

  • 作者单位

    Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNV), 7491 Trondheim, Norway;

    SINTEF Materials and Chemistry, 7465 Trondheim, Norway;

    Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNV), 7491 Trondheim, Norway;

    Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway;

    Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNV), 7491 Trondheim, Norway;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Aluminium alloy; ECAP; Soft particle; Precipitation; Tensile properties;

    机译：铝合金;亚太经社会软颗粒;沉淀;拉伸性能;

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