摘要
本文基于连续相场模型,对内磁能作用下Fe-Cu-Mn合金中富Cu相析出行为进行了研究,得到不同温度、不同Mn,Cu含量条件下的内磁能对富Cu相的平均颗粒半径、体积分数、吉布斯自由能的影响.模拟结果表明,Mn含量越低,居里温度越高,内磁能对自由能的贡献越大,且内磁能的贡献随温度升高而减小;内磁能降低了相结构转变势垒,促进了相结构转变.沉淀相体积分数随Cu含量增加而增加,通过对比有无内磁能对沉淀相体积分数的影响,内磁能作用导致沉淀相拥有更大的体积分数.因此在内磁能作用下,富Cu相具有较大的平均粒径、体积分数和较小的矫顽力,同时预测了合金硬度的变化趋势.
Based on the continuous phase field model,the precipitation behavior of Cu rich phase in Fe-Cu-Mn alloy under the action of internal magnetic energy is studied.The effects of internal magnetic energy on the average particle radius,volume fraction and Gibbs free energy of Cu rich phase at different temperatures and different Mn content and Cu content are investigated.The simulation results show that the lower the Mn content and the higher the Curie temperature,the greater the contribution of internal magnetic energy to free energy is,and the contribution of internal magnetic energy decreases with temperature increasing.The internal magnetic energy reduces the phase structure transition barrier and promotes the phase structure transition.The volume fraction of precipitated phase increases with Cu content increasing.Compared with the effect of internal magnetic energy on the volume fraction of precipitated phase,the effect of internal magnetic energy leads to a large volume fraction of precipitated phase.Therefore,under the action of internal magnetic energy,the Cu rich phase has larger average particle size,volume fraction and smaller coercivity.Finally,the change trend of alloy hardness is predicted.
作者
蒋新安
赵宇宏
杨文奎
田晓林
侯华
Jiang Xin-An;Zhao Yu-Hong;Yang Wen-Kui;Tian Xiao-Lin;Hou Hua(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China)
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2022年第8期1-10,共10页
Acta Physica Sinica
基金
国家自然科学基金(批准号:52074246)
山西省研究生创新项目(批准号:2021Y592)资助的课题~~。
关键词
Fe-Cu-Mn合金
相场法
内磁能
沉淀析出
组织性能
Fe-Cu-Mn alloy
phase field method
internal magnetic energy
precipitation
microstructure and properties
