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Enhancement of strength and ductility of Cu-Sn-Zn alloy by iron addition

机译:添加铁可提高Cu-Sn-Zn合金的强度和延展性

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摘要

Effects of iron addition to Cu-Sn-Zn alloy on the microstructures and mechanical properties were investigated. The Cu-Sn-Zn-Fe alloy, aged at 500 ℃ for 4 h, showed a peak hardness and an excellent combination of strength and ductility; e.g. a yield strength of 264 MPa, an ultimate tensile strength of 514 MPa and a fracture elongation of around 50%. The precipitates responsible for the strengthening are identified as bcc Fe with diameters ranging from 20 to 60 nm, and the interfacial relationship between the precipitate and copper matrix is (002)_M//(110)_P. It is discussed that Orowan dislocation bypassing can be a dominant strengthening mechanism; quantitative calculations for strengthening due to precipitation and grain refinement are roughly similar to the experimental results of the present Cu alloy. Additionally, the high work-hardening rate in a peak aged condition can be responsible for high tensile ductility of the alloy.
机译:研究了铁添加到Cu-Sn-Zn合金中对组织和力学性能的影响。在500℃时效4 h的Cu-Sn-Zn-Fe合金表现出峰值硬度和强度与延展性的完美结合;例如屈服强度为264 MPa,极限抗拉强度为514 MPa,断裂伸长率约为50%。负责强化的析出物被鉴定为直径为20至60 nm的bcc Fe,析出物与铜基体之间的界面关系为(002)_M //(110)_P。讨论了绕开Orowan位错可能是主要的强化机制。由于析出和晶粒细化而产生的强化的定量计算与本发明的Cu合金的实验结果大致相似。另外,在峰值时效条件下的高加工硬化率可导致合金的高拉伸延展性。

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  • 来源
    《Materials Science and Engineering》 |2014年第26期|246-252|共7页
  • 作者单位

    Educational Key Laboratory of Nonferrous Metal Materials Science and Engineering, School of Materials Science and Engineering, Central South University, Changsha 410083, China;

    Educational Key Laboratory of Nonferrous Metal Materials Science and Engineering, School of Materials Science and Engineering, Central South University, Changsha 410083, China,Institute for Materials Microstructure, Central South University, Changsha 410083, China;

    State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;

    Educational Key Laboratory of Nonferrous Metal Materials Science and Engineering, School of Materials Science and Engineering, Central South University, Changsha 410083, China;

    Educational Key Laboratory of Nonferrous Metal Materials Science and Engineering, School of Materials Science and Engineering, Central South University, Changsha 410083, China;

    UEC Tokyo (The University of Electro-Communications), Chofu, Tokyo 182-8585, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Copper alloys; Aging; Iron precipitates; Microstructure; Mechanical properties;

    机译:铜合金;老化;铁沉淀;微观结构机械性能;

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