高温下多主元合金的动态变形行为与本构建模

邱吉 苏步云 金涛 姚小虎 树学峰 李志强 方慧青

邱吉, 苏步云, 金涛, 姚小虎, 树学峰, 李志强, 方慧青. 高温下多主元合金的动态变形行为与本构建模[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0439
引用本文: 邱吉, 苏步云, 金涛, 姚小虎, 树学峰, 李志强, 方慧青. 高温下多主元合金的动态变形行为与本构建模[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0439
QIU Ji, SU Buyun, JIN Tao, YAO Xiaohu, SHU Xuefeng, LI Zhiqiang, FANG Huiqing. Dynamic deformation behavior and constitutive model of multi-component alloys at high temperature[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0439
Citation: QIU Ji, SU Buyun, JIN Tao, YAO Xiaohu, SHU Xuefeng, LI Zhiqiang, FANG Huiqing. Dynamic deformation behavior and constitutive model of multi-component alloys at high temperature[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0439

高温下多主元合金的动态变形行为与本构建模

doi: 10.11883/bzycj-2023-0439
基金项目: 国家自然科学基金(12302477,12272255,12272256);山西省基础研究自由探索项目(202203021222081)
详细信息
    作者简介:

    邱 吉(1992- ),男,博士,讲师,qiuji@tyut.edu.cn

    通讯作者:

    方慧青(1985- ),女,博士,讲师,fanghuiqing@tyut.edu.cn

  • 中图分类号: O347.3

Dynamic deformation behavior and constitutive model of multi-component alloys at high temperature

  • 摘要: 为加速多主元合金在航空工业领域的应用,将航空发动机经常面临的高温高应变率耦合环境作为实验条件,在5种温度下开展了CoCrFeNiMn多主元合金的动态压缩实验和变形后试样的塑性变形机理微观表征。结果表明:在1273 K的高温环境中,多主元合金的动态屈服强度可达200 MPa,表现出较好的耐高温性能;随着动态塑性应变的增加,材料内部出现了晶粒粗化的现象,并且在晶界处具有更高的亚结构孕育能力。此外,量化了不同环境温度下动态塑性变形过程中绝热温升的变化规律,指出了现有动态本构关系对CoCrFeNiMn多主元合金在宽温度域内动态应力-应变关系预测能力的不足。最后,通过解耦分析初始屈服与塑性流动阶段的温度效应,建立了一个指数形式的唯象动态本构方程。该本构方程可用于预测冲击载荷作用下宽温度域内多主元合金的屈服强度和塑性流动规律。
  • 图  1  CoCrFeNiMn多主元合金的XRD谱

    Figure  1.  XRD pattern of the CoCrFeNiMn multi-principal component alloy

    图  2  CoCrFeNiMn多主元合金的EBSD测量结果

    Figure  2.  EBSD measurement results of CoCrFeNiMn multicomponent alloy

    图  3  高温动态实验加载装置与试样形貌

    Figure  3.  High temperature dynamic experimental loading device and morphologies of samples

    图  4  不同温度下CoCrFeNiMn多主元合金的动态应力-应变曲线

    Figure  4.  Dynamic stress-strain curves of CoCrFeNiMn multi-principal component alloys at different temperatures

    图  5  不同温度下CoCrFeNiMn多主元合金的微观结构演变

    Figure  5.  Microstructure evolution of CoCrFeNiMn multi-component alloys at different temperatures

    图  6  不同温度下CoCrFeNiMn多主元合金变形后的局部平均取向差和晶界角

    Figure  6.  The KAM and grain boundary misorientation of CoCrFeNiMn multi-component alloys after deformation at different temperatures

    图  7  不同温度下塑性应变与绝热温升之间的关系

    Figure  7.  Relationship between plastic strain and adiabatic temperature rise at different temperatures

    图  8  不同温度下塑性应变与温度敏感指数之间的关系

    Figure  8.  Relationship between plastic strain and temperature sensitivity index at different temperatures

    图  9  动态加载下初始屈服应力与变形温度的关系

    Figure  9.  Relationship between initial yield stress and deformation temperature under dynamic loading

    图  10  材料参数A与变形温度的关系

    Figure  10.  Relationship between material parameter A and deformation temperature

    图  11  不同温度下动态应力-应变曲线实验结果与理论结果的对比

    Figure  11.  Comparison between predicted and experimental dynamic stress-strain curves at different temperatures

    表  1  模型参数

    Table  1.   Parameters of proposed model

    $ {\sigma _{\text{t}}} $/MPa$ \beta $/K−1a/MPa$ {\beta _{\text{1}}} $/K−1b/MPan$ {\sigma _{{\text{at}}}} $/MPa
    733.161.23×10−3226.011.36×10−3204.900.69115.42
    下载: 导出CSV
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  • 收稿日期:  2023-12-22
  • 修回日期:  2024-03-06
  • 网络出版日期:  2024-03-20

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