Simulatingthe Effect of Temperature Gradient on Grain Growth of 6061-T6 Aluminum Alloy via Monte Carlo Potts Algorithm  

作　　者：Qi Wu Jianan Li Lianchun Long Linao Liu 

机构地区：[1]Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing,100124,China

出　　处：《Computer Modeling in Engineering & Sciences》2021年第10期99-116,共18页工程与科学中的计算机建模（英文）

基　　金：The authors would like to acknowledge the financial support from China Postdoctoral Science Foundation Project(2018M641128);the National Key Research and Development Program of China(2018YFB0703500).

摘　　要：During heat treatment or mechanical processing,most polycrystalline materials experience grain growth,which significantly affects their mechanical properties.Microstructure simulation on a mesoscopic scale is an important way of studying grain growth.A key research focus of this type of method has long been how to efficiently and accurately simulate the grain growth caused by a non-uniform temperature field with temperature gradients.In this work,we propose an improved 3D Monte Carlo Potts(MCP)method to quantitatively study the relationship between non-uniform temperature fields and final grain morphologies.Properties of the aluminum alloy AA6061-T6 are used to establish a trial calculation model and to verify the algorithms with existing experimental results in literature.The detailed grain growth process of the 6061-T6 aluminum alloy under different temperature fields is then obtained,and grain morphologies at various positions are analyzed.Results indicate that while absolute temperature and duration time are the primary factors determining the final grain size,the temperature gradient also has strong influence on the grain morphologies.The relationships between temperatures,temperature gradients and grain growth process have been established.The proposed MCP algorithm can be applied to different types of materials when the proper parameters are used.

关 键 词：Grain growth temperature gradient polycrystalline materials Monte Carlo method aluminum alloy 

分 类 号：TG1[金属学及工艺—金属学]