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细晶TC4钛合金的动态再结晶行为及数值模拟
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作者单位:

1.西安建筑科技大学冶金工程学院;2.陕西宏远航空锻造有限责任公司

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中图分类号:

TG 146.4

基金项目:

陕西省重点研发计划国际合作项目(2020KW-033);陕西省教育厅产业化项目(20JC024);西安市科技计划项目(21XJZZ0035)


Dynamic recrystallization behavior and numerical simulation of fine grain TC4 titanium alloy
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Affiliation:

Xi’an University of Architecture Technology,Xi’an

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    采用实验和有限元模拟相结合的方法,研究了经连续变断面循环挤压制备的细晶TC4钛合金热加工过程中的动态再结晶(DRX)行为。通过实验得到的真应力-应变曲线,建立了细晶TC4钛合金的临界应变模型和DRX动力学模型,并基于所建立的DRX模型,采用DEFORM-3D软件对其热压缩过程进行了模拟。结果表明:热压缩工艺参数对细晶TC4合金的DRX行为有显著影响;随着变形温度的升高和应变速率的降低,动态再结晶的体积分数(XDRX)及其晶粒尺寸均增大;随着应变的增大,变形区的等效应变和区域范围均增大;合金变形时,XDRX的实验值与其模拟值的相关性为0.9762,表明所建立的模型具有较高的精度。

    Abstract:

    The dynamic recrystallization (DRX) behavior of fine-grain TC4 titanium alloy prepared by continuous variable cross-section recycled extrusion during hot working was investigated by combining experiment and finite element simulation. The critical strain and DRX dynamic models of fine-grain TC4 titanium alloy were established based on the true stress-strain curves obtained by the experiment. The material properties were defined based on the DRX models, and the thermal compression process was simulated by DEFORM-3D software. The results show that the DRX behavior of fine grain TC4 is significantly affected by thermal compression processing parameters; the volume fraction of dynamic recrystallization (XDRX) and the grain size are increased with increasing deformation temperature and decreasing strain rate; the equivalent strain and range of the deformation zone are increased simultaneously with increasing strain; the correlation between the experimental value and the simulated value of XDRX is 0.9762, which indicates the high accuracy of the established model.

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刘莹莹,李嘉懿,郭文虎,张君彦,翟江波.细晶TC4钛合金的动态再结晶行为及数值模拟[J].稀有金属材料与工程,2022,51(11):4137~4145.[Liu Yingying, Li Jiayi, Guo Wenhu, Zhang Junyan, Zhai Jiangbo. Dynamic recrystallization behavior and numerical simulation of fine grain TC4 titanium alloy[J]. Rare Metal Materials and Engineering,2022,51(11):4137~4145.]
DOI:10.12442/j. issn.1002-185X.20220350

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历史
  • 收稿日期:2022-04-24
  • 最后修改日期:2022-06-23
  • 录用日期:2022-06-23
  • 在线发布日期: 2022-12-02
  • 出版日期: 2022-11-30