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
Key words
TiAl alloy/high dimensional chaos/high potential dissolution/Poincare section
维普
万方数据