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Comparison of dynamic-aging creep and pre-aged creep in Ti-15-3 beta titanium alloy

机译：Ti-15-3β钛合金动态老化蠕变和预老化蠕变的比较

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摘要

For study the high temperature application of beta titanium, all experimental creep test temperatures and the pre-aged temperature were lower than the predicted p-transus temperature (1067 K). The creep properties of the pre-aged material were superior to those of the as-received material. The activation energies of the pre-aged creep material under various test conditions were approximately twice those of the as-received material under dynamic-aging creep, even though the stress exponent of the pre-aged material was lower than that of the as-received material. Creep deformation was predominated by the diffusion mechanism. The decline in the hardness of the pre-aged creep material under an applied stress of 200 MPa was ascribed to the coarsening and degeneration of the acicular α (secondary α).
机译：对于研究β钛的高温施加，所有实验蠕变试验温度和预老化温度低于预测的P-转变温度（1067k）。预先老化材料的蠕变性质优于由接收物质的材料。在各种试验条件下，预先老化蠕变材料的激活能量大约是动态蠕变下的接收材料的两倍，即使预先老化材料的应力指数低于接收的应力指数材料。蠕变变形由扩散机制占主导地位。在200MPa的施加应力下，预先老化的蠕变材料的硬度下降均匀于针状α（次级α）的粗化和退化。

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  • 来源
    《Materials Science and Engineering》 |2020年第4期|140135.1-140135.12|共12页
  • 作者

    Ping-Jui Yu; Yuan-Yi Hsu; Shing-Hoa Wang; Jer-Ren Yang; Yo-Lun Yang; Horng-Yi Chang; Chih-Yuan Chen; Hsueh-Ren Chen;

  • 作者单位

    Department of Mechanical Engineering National Taiwan Ocean University Keelung 20224 Taiwan;

    Department of Mechanical Engineering National Taiwan Ocean University Keelung 20224 Taiwan;

    Department of Mechanical Engineering National Taiwan Ocean University Keelung 20224 Taiwan;

    Department of Materials Science and Engineering National Taiwan University Taipei 10617 Taiwan;

    Department of Mechanical Engineering National Taipei University of Technology Taipei 10608 Taiwan;

    Department of Marine Engineering National Taiwan Ocean University Keelung 20224 Taiwan;

    Graduate Institute of Intellectual Property National Taipei University of Technology Taipei 10608 Taiwan;

    Department of Materials Science and Engineering National Taiwan University Taipei 10617 Taiwan;

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

    Creep; Activation energy; Diffusion mechanism; Acicular α; Beta titanium;

    机译：蠕动;活化能;扩散机制;针状α;β钛合金;

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