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首页> 外文期刊>Materials Science and Engineering >The construction of constitutive model and identification of dynamic softening mechanism of high-temperature deformation of Ti-5Al-5Mo-5V-1Cr-1Fe alloy
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The construction of constitutive model and identification of dynamic softening mechanism of high-temperature deformation of Ti-5Al-5Mo-5V-1Cr-1Fe alloy

机译：Ti-5Al-5Mo-5V-1Cr-1Fe合金高温变形本构模型的建立和动态软化机理的确定

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摘要

The high-temperature deformation behaviors of Ti-5Al-5Mo-5V-1Cr-1Fe alloy were investigated through the isothermal compression experiment. The dislocation evolution in the working-hardening stage has been analyzed and the corresponding constitutive model has been constructed. The dynamic softening mechanism has been identified with the relationship between the saturated dislocation density and dynamic recrystallization (DRX) critical density. The dependence on deformation parameters has been discussed and a concept of critical strain rate ε_(C) has been proposed. A dynamic softening map has been designed to predict the corresponding softening behaviors under certain deformation conditions. The constitutive model based on dislocation evolution has been extended to overall deformation incorporating dynamic softening behaviors and their deviations have been explained by introducing the processing map.
机译：通过等温压缩实验研究了Ti-5Al-5Mo-5V-1Cr-1Fe合金的高温变形行为。分析了加工硬化阶段的位错演化，并建立了相应的本构模型。通过饱和位错密度与动态重结晶（DRX）临界密度之间的关系，已经确定了动态软化机制。讨论了对变形参数的依赖性，并提出了临界应变率ε_（C）的概念。设计了动态软化图，以预测在某些变形条件下的相应软化行为。基于位错演化的本构模型已扩展到包含动态软化行为的整体变形，并且通过引入加工图来解释了它们的偏差。

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  • 来源
    《Materials Science and Engineering》 |2014年第6期|42-50|共9页
  • 作者

    Houquan Liang; Hongzhen Guo; Yang Nan; Chun Qin; Xiaona Peng; Jingli Zhang;

  • 作者单位

    School of Materials Science and Engineering Northwestern Polytechnical University, 127 Youyixi Street, Xi'an 710012, PR China;

    School of Materials Science and Engineering Northwestern Polytechnical University, 127 Youyixi Street, Xi'an 710012, PR China;

    School of Materials Science and Engineering Northwestern Polytechnical University, 127 Youyixi Street, Xi'an 710012, PR China;

    School of Materials Science and Engineering Northwestern Polytechnical University, 127 Youyixi Street, Xi'an 710012, PR China;

    School of Materials Science and Engineering Northwestern Polytechnical University, 127 Youyixi Street, Xi'an 710012, PR China;

    School of Materials Science and Engineering Northwestern Polytechnical University, 127 Youyixi Street, Xi'an 710012, PR China;

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

    Constitutive model; Dynamic softening mechanism; High-temperature deformation; Dislocation evolution; Titanium alloys;

    机译：本构模型;动态软化机制;高温变形;位错演变;钛合金;

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