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Tensile mechanical behavior of as-cast AA7050 alloy in the super-solidus temperature range

机译：超固相线温度范围内铸态AA7050合金的拉伸力学行为

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摘要

Aluminum 7050 alloy is one of the primary alloys for the aviation industry owing to its excellent mechanical properties. However, this alloy has several poor physical properties that affect its solidification, such as relatively low thermal conductivity and large solidification range. These properties tend to increase the hot tearing susceptibility of the alloy, which makes it difficult to produce by direct-chill (DC) casting. Accurate knowledge of the mechanical behavior of the alloy during solidification is therefore crucial to ensure safe control of the casting process. Present work focuses on measuring the tensile mechanical properties of an as-cast AA7050 in the temperature range where hot tearing mainly occurs, i.e. from solid fractions of 0.85 to 1.0, or the solidus. Through these experiments, we extracted mechanical properties such as strain-rate sensitivity and ductility of the alloy in the super-solidus temperature range. The data obtained from this work will be useful in thermo-mechanical computer simulations aimed at reducing the hot tearing occurrence during DC casting, thus optimizing the production rate in the casting house.
机译：铝7050合金由于其优异的机械性能而成为航空业的主要合金之一。但是，这种合金的几种较差的物理性能会影响其凝固，例如较低的导热率和较大的凝固范围。这些性质趋于增加合金的热撕裂敏感性，这使得难以通过直接冷（DC）铸造来生产。因此，准确了解合金在凝固过程中的机械行为对于确保安全控制铸造过程至关重要。当前的工作集中在在主要发生热撕裂的温度范围内，即从0.85至1.0的固体分数或固相线，测量铸态AA7050的拉伸机械性能。通过这些实验，我们提取了在超固相线温度范围内的力学性能，例如应变率敏感性和合金的延展性。从这项工作中获得的数据将在热机械计算机仿真中有用，该仿真旨在减少DC铸造过程中发生的热撕裂现象，从而优化铸造车间的生产率。

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  • 来源
  • 会议地点 Beijing(CN)
  • 作者

    T Subroto; A Miroux; D G Eskin; K Ellingsen; A Marson; M MHamdi; Katgerman;

  • 作者单位

    Materials innovation institute (M2i),Mekelweg 2,Delft,2628 CD,The Netherlands;

    Dept.of Mat.Sci.and Engineering,Delft University of Technology,Mekelweg 2,Delft,2628 CD,The Netherlands;

    Materials innovation institute (M2i),Mekelweg 2,Delft,2628 CD,The Netherlands;

    Dept.of Mat.Sci.and Engineering,Delft University of Technology,Mekelweg 2,Delft,2628 CD,The Netherlands;

    BCAST,Brunel University,Uxbridge,Middlesex,UB8 3PH,United Kingdom;

    SINTEF Materials and Chemistry,NO-0314 Oslo,Norway;

    SINTEF Materials and Chemistry,NO-7465 Trondheim,Norway;

    SINTEF Materials and Chemistry,NO-0314 Oslo,Norway;

    Dept.of Mat.Sci.and Engineering,Delft University of Technology,Mekelweg 2,Delft,2628 CD,The Netherlands;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 断裂理论;
  • 关键词

    AA7050; DC Casting; solidification; hot tearing; tensile mechanical properties;

    机译：AA7050;直流铸造;凝固;热撕裂;拉伸力学性能;

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