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On the influence of processing parameters on microstructural evolution of a near alpha titanium alloy

机译：加工参数对近α钛合金组织演变的影响

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摘要

The effect of processing parameters on the microstructural evolution of Ti60 alloy were examined by isothermal compression tests over the temperature range of 960-1110 ℃ at constant strain rates of 0.001-10s_(-1). It was found that the flow stress decreased with increasing temperature and decreasing strain rate. The flow stress behavior revealed greater flow softening in the α+ β phase field compared with that of β phase field. The volume fraction and grain size of primary α phase decreased and the prior- β grain size increased with increasing temperature. The lamellar α phase within the prior-p grains were distorted, broken up and globularized in the α+ βphase field, while a small amount of recrystallized grains were formed at the elongated prior-p grain boundaries in the β phase field. The degree of dynamic recrystallization increased with increasing temperature, strain rate and strain. The recrystallized grain size increased with increasing temperature and decreasing strain rate.
机译：在恒定应变率0.001-10s _（-1）下，在960-1110℃的温度范围内，通过等温压缩试验研究了工艺参数对Ti60合金显微组织演变的影响。发现流动应力随着温度的升高和应变速率的降低而减小。与β相场相比，流动应力行为显示出在α+β相场中更大的流动软化。随着温度的升高，初生α相的体积分数和晶粒尺寸减小，而先验β相的晶粒尺寸增大。先验p晶粒内的层状α相在α+β相场中变形，破裂并呈球状，而在β相场中伸长的先验p晶界处形成了少量的再结晶晶粒。动态再结晶程度随温度，应变速率和应变的增加而增加。再结晶晶粒尺寸随温度升高和应变速率降低而增加。

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  • 来源
    《Materials Science and Engineering》 |2011年第2011期|p.135-143|共9页
  • 作者

    Weiju Jia; Weidong Zeng; Jianrong Liu; Yigang Zhou; Qingjiang Wang;

  • 作者单位

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;

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

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;

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

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  • 正文语种 eng
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  • 关键词

    titanium alloy; isothermal compression; microstructure; recrystallization;

    机译：钛合金;等温压缩;组织;再结晶;

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