基于晶界图像的白铜BFe10-1-1合金耐蚀性预测模型  

Corrosion resistance prediction model of copper-nickel BFe10-1-1 alloy based on grain-boundary image

作　　者：董跃华[1] 满敬金 汪志刚[2] 汪航[2] DONG Yuehua;MAN Jingjin;WANG Zhigang;WANG Hang(School of Information Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西理工大学信息工程学院,江西赣州341000 [2]江西理工大学材料冶金化学学部,江西赣州341000

出　　处：《有色金属科学与工程》2021年第5期61-68,共8页Nonferrous Metals Science and Engineering

基　　金：“十三五”国家重点研发计划重点专项资助项目(2016YFB0301401)。

摘　　要：白铜BFe10-1-1合金的晶界特征分布决定了它的耐腐蚀性,为了调控晶界特征分布来提高其耐蚀性,利用电子背散射衍射技术分析了不同Y含量的BFe10-1-1白铜合金的晶界特征分布。基于晶界的连通性和三叉界角提出了晶界图像特征的数值计算方法,建立了白铜BFe10-1-1合金耐蚀性预测模型,结合模拟海水腐蚀实验研究了晶界图像特征及其对合金耐蚀性的影响。结果表明:晶界的连通性越好,BFe10-1-1白铜合金耐蚀性越差;三叉界角个数过多会导致晶界比例增大,合金耐蚀性变差;相比于前两者,三叉界角角度分布对合金耐蚀性影响程度更大;耐蚀性预测模型的准确率为81.88%,模型预测值与耐蚀性真实值之间一致性较好。The grain-boundary characteristic distribution of copper-nickel BFe10-1-1 alloy determines its corrosion resistance.In order to adjust the grain-boundary characteristic distribution to improve its corrosion resistance,the grain-boundary characteristic distribution of BFe10-1-1 copper-nickel alloy with different Y content was analyzed by electron backscattered diffraction(EBSD).Based on the connectivity and triple junction of grain-boundary,a numerical calculation method of grain-boundary image features was proposed,and a corrosion resistance prediction model of copper-nickel BFe10-1-1 alloy was established.The characteristics of grain-boundary image and its effect on corrosion resistance of the alloy were studied by simulated seawater corrosion experiment.The results showed that the better the connectivity of grain-boundary was,the worse corrosion resistance of BFe10-1-1 copper-nickel alloy was.Too many triple junctions would increase the proportion of grain-boundary,which deteriorated the corrosion resistance of the alloy.Compared with the first two,the angle distribution in the triple junction had a greater impact on the corrosion resistance of the alloy.The accuracy of the corrosion resistance prediction model was 81.88%,and the predicted values of the model agreed with the real values of corrosion resistance.

关 键 词：白铜BFe10-1-1合金 晶界连通性 三叉界角 耐蚀性预测模型 

分 类 号：TG113.231[金属学及工艺—物理冶金] TG146.1[金属学及工艺—金属学]