TiAl合金在高电位流动电解液中的庞加莱截面分析  

Poincare Section Analysis of TiAl Alloy in High Potential Flow Electrolyte

作　　者：刘伦峰 李凌 王鑫[1] 李文元[1] 廖翠姣[1] LIU Lunfeng;LI Ling;WANG Xing;LI Wenyuan;LIAO Cuijiao(School of Mechanical Engineering,Hunan University of Technology,Zhuzhou 412007,China)

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412007

出　　处：《电加工与模具》2024年第1期35-41,共7页Electromachining & Mould

基　　金：国家自然科学基金项目(22072040);湖南省自然科学基金项目(2020JJ4271)。

摘　　要：TiAl合金在高电位电化学溶解过程中的电流密度时间序列呈现出明显的高维混沌行为,相空间重构已不能直观地展示系统的具体形态,针对此问题采用庞加莱截面、差分庞加莱截面及分布熵定量表征TiAl合金在不同压力电解液中的高电位溶解电流密度时间序列的非线性行为特征。研究表明:差分庞加莱截面由于其去趋势化作用能更直观地反映合金电流密度的局部波动,局部波动越大散点越分散,说明合金发生非均匀溶解,局部波动越小散点越聚集,说明合金发生均匀溶解。结合分布熵运算结果可知,TiAl合金高电位电化学溶解系统在电解液压力为0.4 MPa时最稳定,合金发生均匀稳定溶解。The current density time series of TiAl alloy during high potential electrochemical dissolution exhibits obvious high-dimensional chaotic behavior,and the phase space reconstruction cannot directly display the specific morphology of the system.To address this issue,Poincare section,differential Poincare section and distribution entropy were used to characterize the nonlinear behavior of the high potential dissolution current density time series of TiAl alloy in electrolyte under different pressures.The result showed that the differential poincare section can more directly reflect the local fluctuation of alloy current density due to its detrending effect.The larger the local fluctuation,the more dispersed the scattered points,indicating the heterogeneous dissolution of the alloy.The smaller the local fluctuation,the more clustered the scattered points,indicating the homogeneous dissolution of the alloy.Based on the result of distribution entropy calculation,it can be concluded that the high potential electrochemical dissolution system of TiAl is the most stable at an electrolyte pressure of 0.4 MPa,and the alloy dissolves uniformly and stably.

关 键 词：TIAL合金 高维混沌 高电位溶解 庞加莱截面 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]