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Microstructural evolution and mechanical properties of powder metallurgy Ti-6Al-4V alloy based on heat response

机译：基于热响应的粉末冶金Ti-6Al-4V合金的组织演变和力学性能

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摘要

In present work, powder metallurgy (PM) Ti-6Al-4V alloy was produced by hot isostatic pressing (HIPing) from gas atomized powder. Various HIPing conditions and heat treatments were used to investigate the heat response of PM Ti-6Al-4V alloy. The results show that the optimization of HIPing parameters is temperature from 920 to 940 ℃, pressure over 120 MPa and holding for 3 h. The micro-structure of powder compact changes significantly after different heat treatments, while there was no obvious difference in tensile properties. Temperature induced porosity (TIP) in powder compact occurred after annealing at 930 ℃ for 1 h plus aging. The TIP has no obvious effects on tensile, impact, and fracture toughness properties of powder compact, but the TIP has an adverse effect on fatigue property, especially at shorter fatigue lives. In order to eliminate the TIP in powder compact, several probable solutions were suggested for the application of titanium powder components.
机译：在目前的工作中，粉末冶金（PM）Ti-6Al-4V合金是通过热等静压（HIPing）由气体雾化的粉末生产的。使用各种HIPing条件和热处理来研究PM Ti-6Al-4V合金的热响应。结果表明，HIPing参数的优化是温度在920〜940℃，压力在120 MPa以上并保持3h。不同热处理条件下，粉体的微观结构发生明显变化，而拉伸性能无明显差异。在930℃退火1 h加时效后，压粉体产生了温度诱导的孔隙率（TIP）。 TIP对粉末成形体的拉伸，冲击和断裂韧性没有明显影响，但TIP对疲劳性能有不利影响，尤其是在较短的疲劳寿命下。为了消除粉末压块中的TIP，建议了几种可能的解决方案来应用钛粉组分。

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  • 来源
    《Materials Science and Engineering》 |2015年第15期|327-334|共8页
  • 作者

    Ruipeng Guo; Lei Xu; Jie Wu; Rui Yang; Bernie Y. Zong;

  • 作者单位

    School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China,Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;

    Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;

    Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;

    Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;

    Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Powder metallurgy; Ti-6Al-4V; Hot isostatic pressing; Mechanical properties; X-ray tomography;

    机译：粉末冶金;Ti-6Al-4V;热等静压;机械性能X射线断层扫描;

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