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Microstructure and mechanical properties of new composite structured Ti-V-Al-Cu-Ni alloys for spring applications

机译:弹簧用新型复合结构Ti-V-Al-Cu-Ni合金的组织和力学性能

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摘要

New as-cast Ti-V-Cu-Ni-Al alloys with advantageous modulus of resilience and bioperformance were developed. Their microstructure is composed of a dendritic β-Ti phase and in-situ precipitated interdendritic compounds. The tough and ductile β-Ti phase exhibits a relatively low Young's modulus. Ultrafine intermetallics effectively strengthen the alloys. The effect of microstructure on tensile plasticity was studied on strained (in-situ) and fractured (ex-situ) samples in the scanning electron microscope. It was found that the ductility depends on the volume fraction/distribution of the intermetallic phases as well as local segregation. Already in the as-cast state Ti_(68.8)V_(13.6)Cu_6Ni_(5.1)Al_(6.5) exhibits a tensile strength of about 1250 MPa and a ductility of about 4.5%.
机译:开发了具有良好回弹模量和生物性能的新型铸造Ti-V-Cu-Ni-Al合金。它们的微观结构由树枝状的β-Ti相和原位沉淀的树枝状间化合物组成。韧性和延展性的β-Ti相表现出较低的杨氏模量。超细金属间化合物有效地增强了合金。在扫描电子显微镜中研究了应变(原位)和断裂(异位)样品的微观结构对拉伸塑性的影响。发现延展性取决于金属间相的体积分数/分布以及局部偏析。 Ti_(68.8)V_(13.6)Cu_6Ni_(5.1)Al_(6.5)的铸态已经显示出约1250 MPa的拉伸强度和约4.5%的延展性。

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  • 来源
    《Materials Science and Engineering》 |2014年第6期|76-83|共8页
  • 作者单位

    IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany ,Technische Universitaet Dresden, Institut fuer Werkstoffwissenschaft, D-01062 Dresden, Germany ,P.O. Box 270016, D-01171 Dresden, Germany;

    IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany;

    IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany ,Technische Universitaet Dresden, Institut fuer Werkstoffwissenschaft, D-01062 Dresden, Germany;

    IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany ,Technische Universitaet Bergakademie Freiberg, Institut fuer Werkstoffwissenchaft, Gustav-Zeuner-Str. 5, D-09599 Freiberg, Germany;

    IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany ,Institute of Natural Sciences, Ural Federal University, 620000 Ekaterinburg, Russia;

    IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany ,Technische Universitaet Dresden, Institut fuer Werkstoffwissenschaft, D-01062 Dresden, Germany;

    Technische Universitaet Dresden, Institut fuer Strukturphysik, D-01062 Dresden, Germany;

    Technische Universitaet Dresden, Institut fuer Strukturphysik, D-01062 Dresden, Germany;

    IFW Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany ,Technische Universitaet Dresden, Institut fuer Werkstoffwissenschaft, D-01062 Dresden, Germany;

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

    Titanium alloys; Tensile ductility; Electron microscopy; Mechanical characterization; Fracture;

    机译:钛合金;拉伸延展性;电子显微镜;机械特性断裂;

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