相场模拟研究AZ31B镁合金的动态再结晶

许可 盛杰 刘瑜 黄厚兵 施小明 宋海峰

许可, 盛杰, 刘瑜, 黄厚兵, 施小明, 宋海峰. 相场模拟研究AZ31B镁合金的动态再结晶[J]. 高压物理学报, 2024, 38(3): 030105. doi: 10.11858/gywlxb.20230780
引用本文: 许可, 盛杰, 刘瑜, 黄厚兵, 施小明, 宋海峰. 相场模拟研究AZ31B镁合金的动态再结晶[J]. 高压物理学报, 2024, 38(3): 030105. doi: 10.11858/gywlxb.20230780
XU Ke, SHENG Jie, LIU Yu, HUANG Houbing, SHI Xiaoming, SONG Haifeng. Insight into Dynamic Recrystallization of AZ31B Magnesium Alloys by Phase-Field Simulations[J]. Chinese Journal of High Pressure Physics, 2024, 38(3): 030105. doi: 10.11858/gywlxb.20230780
Citation: XU Ke, SHENG Jie, LIU Yu, HUANG Houbing, SHI Xiaoming, SONG Haifeng. Insight into Dynamic Recrystallization of AZ31B Magnesium Alloys by Phase-Field Simulations[J]. Chinese Journal of High Pressure Physics, 2024, 38(3): 030105. doi: 10.11858/gywlxb.20230780

相场模拟研究AZ31B镁合金的动态再结晶

doi: 10.11858/gywlxb.20230780
基金项目: 国家科技部重点研发计划(2021YFB3501503);国家自然科学基金(U2230401);计算物理全国重点实验室基金
详细信息
    作者简介:

    许 可(1996-),男,博士研究生,主要从事镁合金动态加载的相场模拟研究. E-mail:xukebit@qq.com

    通讯作者:

    刘 瑜(1985-),男,博士,副研究员,博士生导师,主要从事高压物理、凝聚态物理、材料物理相关的理论研究. E-mail:liu_yu@iapcm.ac.cn

  • 中图分类号: O521.2; O347.3

Insight into Dynamic Recrystallization of AZ31B Magnesium Alloys by Phase-Field Simulations

  • 摘要: 镁合金被广泛应用于材料科学、航空航天及军事装备等领域。实验发现,镁合金材料在动态加载下的力学响应与介观尺度不连续动态再结晶紧密相关。为此,构建了镁合金动态再结晶的相场模型,以AZ31B镁合金为研究对象,模拟了不同温度(250~400 ℃)、低应变率(0.01~1.00 s−1)加载下的不连续动态再结晶演化过程。再结晶相场模型耦合了塑性应变,实现了应力-应变曲线与再结晶组织演化的迭代求解。模拟发现,再结晶晶粒的体积分数和平均晶粒尺寸随温度的升高而明显增大,随应变率的增大而减小。

     

  • 图  初始多晶与再结晶晶粒序参量构造示意图[25]

    Figure  1.  Schematic diagram of the order parameter configuration of initial polycrystalline and recrystallized grains[25]

    图  动态再结晶本构模型构造示意图

    Figure  2.  Schematic diagram of the constitutive model of dynamic recrystallization

    图  AZ31B镁合金多晶在300 ℃、不同应变率动态加载下的微观组织(序参量η)演化

    Figure  3.  Microstructure (η) evolution of AZ31B magnesium alloy polycrystal under dynamic loading at a temperature of 300 °C and different strain rates

    图  AZ31B镁合金多晶在应变率为1.00 s−1、不同温度动态加载下的微观组织(序参量η)演化

    Figure  4.  Microstructure (η) evolution of AZ31B magnesium alloy polycrystal under dynamic loading at a strain rate of 1.00 s−1 and different temperatures

    图  动态再结晶体积分数与(a)温度和(b)应变率的关系以及再结晶平均晶粒尺寸随应变的演化与(c)温度和(d)应变率的关系

    Figure  5.  Recrystallization volume fraction of dynamic recrystallization versus (a) temperature and (b) strain rate, and the evolution of average grain size with strain versus (c) temperature and (d) strain rate

    图  动态再结晶关于形核率$ \dot{n} $与晶界迁移速率Mgb的平均晶粒尺寸相图(形核速率和晶界迁移速率均采用真实数值)

    Figure  6.  Phase diagram of the average grain size of dynamic recrystallization with respect to the nucleation rate ($ \dot{n} $) versus the grain boundary migration rate Mgb, where real values are used for both the nucleation rate and the grain boundary migration rate

    图  AZ31B镁合金在动态加载下的应力-应变曲线(实线为实验测量数据[27],样条为相场模拟结果)

    Figure  7.  Stress-strain curves of AZ31B magnesium alloy under dynamic loading (The solid lines represent the experimental data[27], and the splines represent the phase field simulation results)

    表  1  AZ31B镁合金的相场模型参数[23, 26]

    Table  1.   Model parameters for phase-field simulation of AZ31B magnesium alloy[23, 26]

    α μ/GPa b/m Qdrx/(kJ·mol−1) Qself/(kJ·mol−1)
    0.5 17.0 3.2×10−10 158.7 156.2
    γgb/(J·m−2) Dgb/(m2·s−1) q kB/(J·K−1) R/(J·mol−1·K−1)
    0.55 3.2×10−8 0.634 1.38×10−12 8.314
    下载: 导出CSV

    表  2  AZ31B镁合金的相场模拟初始化参数[23]

    Table  2.   Initialization parameters for phase-field simulation of AZ31B magnesium alloy[23]

    Wgb/μm Δε εend Ng T/℃ $ \dot{\varepsilon }/{\mathrm{s}} $−1
    1.0 0.001 1.0 9 250−400 0.01−1.00
    下载: 导出CSV

    表  3  相场模拟使用的力学本构参数[2627]

    Table  3.   Constitutive parameters used for phase-field simulations[2627]

    T/℃ $ \dot{\varepsilon }/{\mathrm{s}} $−1 σsat/MPa σss/MPa Ω εcrit
    250 1.00 187 130 26.35 0.320
    300 0.01 87 59 42.31 0.093
    300 0.10 117 75 31.97 0.112
    300 1.00 155 77 28.07 0.180
    350 1.00 116 65 30.44 0.110
    400 1.00 86 61 39.65 0.200
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-11-07
  • 修回日期:  2024-01-19
  • 网络出版日期:  2024-04-03
  • 刊出日期:  2024-06-03

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