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首页> 外文期刊>Materials Science and Engineering >Microstructure and Properties of a Novel Cu-Ni-Co-Si-Mg Alloy with Super-high Strength and Conductivity
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Microstructure and Properties of a Novel Cu-Ni-Co-Si-Mg Alloy with Super-high Strength and Conductivity

机译：具有超高强度和导电性的新型Cu-Ni-Co-Si-Mg合金的组织和性能

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摘要

The Cu-4.5Ni-1.2Co-1.0Si-0.15Mg alloy with super-high strength and high electrical conductivity was designed, and a two-step thermo-mechanical treatment was applied to improve the mechanical and electrical properties of the alloy. The microstructure and properties of the alloy were investigated by transmission electron microscope observation, tensile test, hardness and electrical conductivity measurements. The results show that the final alloy treated by two-step thermo-mechanical process has a hardness of 329 HV, a yield strength of 1086 MPa, an elongation of 3.6%, and an electrical conductivity of 30.1%IACS, respectively. The nanoscale beta-Ni3Si and delta-(Co,Ni)(2)Si precipitates form during the thermo-mechanical process, and the addition of the Co could promote the precipitation of delta-(Co,Ni)(2)Si particles. The orientation relationship (OR) between Cu matrix and the precipitates is: (022)(Cu)//(011)(beta)//(010)(delta) and [100](Cu)//[100](beta)//[001](delta). Comparing with the directly aging treatment and one step thermo-mechanical treatment, precipitates that form during the two-step thenno-mechanical process are much smaller and distributed more densely, resulting in the better comprehensive properties of the alloy.
机译：设计了具有超高强度和高电导率的Cu-4.5Ni-1.2Co-1.0Si-0.15Mg合金，并进行了两步热机械处理以改善合金的机械和电性能。通过透射电子显微镜观察，拉伸试验，硬度和电导率测量研究了合金的组织和性能。结果表明，经过两步热机械处理的最终合金的硬度分别为329 HV，屈服强度为1086 MPa，伸长率为3.6％，电导率为30.1％IACS。纳米级的β-Ni3Si和δ-（Co，Ni）（2）Si在热机械过程中形成沉淀，添加Co可以促进δ-（Co，Ni）（2）Si颗粒的沉淀。 Cu基体与沉淀物之间的取向关系（OR）为：（022）（Cu）//（011）β//（010）δ和[100]（Cu）// [100]（β ）// [001]δ。与直接时效处理和一步热机械处理相比，在两步然后无机械过程中形成的沉淀要小得多，并且分布更密集，从而使合金具有更好的综合性能。

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  • 来源
    《Materials Science and Engineering》 |2019年第28期|754-763|共10页
  • 作者

    Huang Jiazhen; Xiao Zhu; Dai Jie; Li Zhou; Jiang Hongyun; Wang Wei; Zhang Xiaoxuan;

  • 作者单位

    Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China;

    Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China|Minist Educ, Key Lab Nonferrous Met Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China;

    Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China;

    Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China|Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China;

    Zhejiang Tianning Alloy Mat Co Ltd, Jinhua 321002, Peoples R China;

    Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China;

    Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Cu-Ni-Co-Si alloy; Super-high strength; Aging; Precipitate;

    机译：Cu-Ni-Co-Si合金;超高强度;时效;析出;

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