基于元胞自动机方法的U71Mn热轧钢轨均匀腐蚀过程模拟  

Simulation of Uniform Corrosion Process of U71Mn Hot-rolled Rail Based on Cellular Automata

作　　者：孙运来 付正鸿 胡雅楠 刘宇轩 温泽峰[2] 阚前华[1] Yunlai Sun;Zhenghong Fu;Yanan Hu;Yuxuan Liu;Zefeng Wen;Qianhua Kan(Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province,School of Mechanics and Aerospace Engineering,Southwest Jiaotong University,Chengdu,611756;National Key Laboratory of Rail Transit Transportation system,Southwest Jiaotong University,Chengdu,610031)

机构地区：[1]应用力学与结构安全四川省重点实验室,力学与航空航天学院,西南交通大学,成都611756 [2]轨道交通运载系统全国重点实验室,西南交通大学,成都610031

出　　处：《固体力学学报》2024年第5期565-575,共11页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金项目(12072295,U21A20167)资助。

摘　　要：钢轨在服役过程中由于环境腐蚀造成的损伤会直接威胁行车安全.因此,开展钢轨材料的腐蚀损伤定量表征对钢轨的服役可靠性评价具有重要意义.本文首先开展了U71Mn热轧钢轨材料在室温3.5 wt.%NaCl溶液中的均匀腐蚀实验,测量了两种试样直径随腐蚀时间的变化,根据实验结果对钢轨材料在3.5 wt.%Nacl盐溶液中的腐蚀机理进行分析.然后采用元胞自动机方法建立钢轨材料试样的腐蚀模型,对试样在3.5 wt.%NaCl溶液中的均匀腐蚀行为进行模拟,根据元胞自动机方法模拟得到的腐蚀不同时间后试样直径的变化数据,对腐蚀速率进行量化,建立不同试样直径随腐蚀时间变化的统一预测公式.结果表明,预测结果与实验结果的平均相对误差为8.7%,即采用元胞自动机方法可合理模拟出U71Mn热轧钢轨试样的均匀腐蚀过程.The impact of environmental corrosion on rail service operations poses a direct safety threat.Therefore,the quantitative characterization of rail corrosion damage is of great significance for evaluating rail reliability.Uniform corrosion experiments on U71Mn hot-rolled rail samples in a 3.5 wt.%NaCl solution at room temperature were first carried out.Changes in the diameters of two samples with corrosion time were measured.According to the experimental results,the corrosion mechanism of rail samples in the 3.5 wt.%Nacl solution was analyzed.A corrosion model employing cellular automata was developed to simulate the uniform corrosion behavior of rail samples in the NaCl solution.The corrosion rate was quantified by tracking sample diameter changes through the cellular automaton simulation over varying corrosion time.A unified prediction formula for different sample diameters with corrosion time was established.Results revealed an average relative error of 8.7%between predicted and measured data,indicating the efficacy of cellular automata in accurately simulating the uniform corrosion process of U71Mn hot-rolled rail samples.

关 键 词：U71Mn热轧钢轨 均匀腐蚀 元胞自动机 腐蚀预测 

分 类 号：TP301.1[自动化与计算机技术—计算机系统结构] TG335.43[自动化与计算机技术—计算机科学与技术] TG172[金属学及工艺—金属压力加工]