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Hot Deformation Behavior and Processing Map of a New High-Temperature Titanium Alloy

机译：新型高温钛合金的热变形行为和加工图

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摘要

Isothermal constant strain rate compression testing of a new as-cast high-temperature titanium alloy Ti-6.5A1-11.5(Sn,Zr)-2.5(Mo,W,Nb)-0.25Si-0.1Er was carried out at the deformation temperatures range from 900℃ to 1100℃, strain rate range from 0.001 to 1 s~(-1) and 60% of engineering strain. The deformation behavior of this high-temperature titanium alloy was analyzed based on the stress-strain result, and the constitutive equation based on the hyperbolic sine model and the parameters of Zener-Hollomon was established, showing a close accordance with the experimental value. The hot processing maps based on the dynamic material model and the Prasad's instability criterion were constructed at strains of 0.3 and 0.6. The maps exhibit two stable deformation domains in the temperature range of 940~960℃ and strain rate range of 0.001~0.002s~(-1), and in the temperature range of 1030~1070℃ and strain rate range of 0.02~0.06s~(-1) with the power dissipation efficiency of 58.5% and 54.5%, respectively.
机译：在变形温度下对新型铸态高温钛合金Ti-6.5A1-11.5（Sn，Zr）-2.5（Mo，W，Nb）-0.25Si-0.1Er进行等温恒应变率压缩试验温度范围为900℃至1100℃，应变率范围为0.001至1 s〜（-1），工程应变的60％。根据应力-应变结果分析了该高温钛合金的变形行为，建立了基于双曲正弦模型和Zener-Hollomon参数的本构方程，与实验值吻合良好。基于动态材料模型和Prasad失稳准则的热加工图是在0.3和0.6应变下构建的。这些图在940〜960℃的温度范围和0.001〜0.002s〜（-1）的温度范围内以及1030〜1070℃的温度范围和0.02〜0.06s的应变范围内表现出两个稳定的变形域。 〜（-1）的功耗效率分别为58.5％和54.5％。

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  • 来源
    《Materials science forum》 |2017年第1期|566-573|共8页
  • 作者

    Shaohui Shi; Lihua Chai; Tao Li; Yongshuang Cui; Guodong Shi; Zhilei Xiang; Ziyong Chen;

  • 作者单位

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

    School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;

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

    High-temperature titanium alloy; Hot deformation; Constitutive relation; Processing map;

    机译：高温钛合金;热变形;本构关系;加工图;

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