Fe-Mn-X(X=Al,Si)三元系合金扩散行为的试验与计算研究  

Experimental and Computational Study on Diffusion Behavior in Ternary Fe-Mn-X(X=Al,Si)Alloys

作　　者：李佳媛 郑伟森[1] 鲁晓刚[1,2] LI Jiayuan;ZHENG Weiseng;LU Xiaogang(School of Material Science and Engineering, Shanghai University, Shanghai 200444;Institute of Material Genome Engineering, Shanghai University, Shanghai 200444)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]上海大学材料基因组工程研究院,上海200444

出　　处：《上海金属》2020年第3期105-110,共6页Shanghai Metals

基　　金：核电设备用钢铁材料设计分析技术研究(No.2012ZX06004-012)。

摘　　要：采用CALPHAD方法对Fe-Mn-X(X=Al,Si)三元合金的扩散动力学进行研究。制备了FCC结构Fe-Mn-Al三元合金的扩散偶,通过电子探针(EPMA)技术测定了相应的成分-距离曲线。并通过合理外推子二元系获得了三元系FCC相的扩散动力学描述,计算模拟的扩散行为与试验结果吻合较好。同时,通过收集评估Fe-Mn-Si三元系BCC相扩散试验数据,对原子移动性参数φMn^Fe,Si和φSi^Fe,Mn进行了优化,获得了可靠准确的Fe-Mn-Si三元系BCC相的扩散动力学描述。Diffusion kinetics in ternary Fe-Mn-X(X=Al,Si)alloys was studied by using the CALPHAD method.The diffusion couples in FCC Fe-Mn-Al alloys were prepared,and the concentration profiles of these couples were measured by the electronic-probe micro analysis(EPMA).Description of diffusion in ternary Fe-Mn-Al FCC alloys was obtained by reasonably extrapolating the sub-binary systems,and the simulated diffusion behavior accorded well with the experimental data.Simultaneuously,through collecting and evaluating the reliable experimental diffusion data of BCC Fe-Mn-Si alloys,the atomic mobility parameters of φMn^Fe,Si and φSi ^Fe,Siwere optimized,and the kinetic description of diffusion in ternary Fe-Mn-Si BCC system was obtained.

关 键 词：Fe-Mn-Al FE-MN-SI CALPHAD 扩散偶 原子移动性 

分 类 号：TG1[金属学及工艺—金属学]