Effect of Strain Restored Energy on Abnormal Grain Growth in Mg Alloy Simulated by Phase Field Methods

2017 International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Wu, Yan^1 ; Huang, Yuan-Yuan^1

School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan, China^1

关键词: Abnormal grain growth;    Annealing treatments;    Effect of strain;    Grain orientation;    Phase field methods;    Phase field models;    Secondary recrystallization;    Simulated results;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/322/2/022055/pdf
DOI  :  10.1088/1757-899X/322/2/022055

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Abnormal grain growth of single phase AZ31 Mg alloy in the spatio-temporal process has been simulated by phase field models, and the influencing factors of abnormal grain growth are studied in order to find the ways to control secondary recrystallization in the microstructure. The study aims to find out the mechanisms for abnormal grain growth in real alloys. It is shown from the simulated results that the abnormal grain growth can be controlled by the strain restored energy. Secondary recrystallization after an annealing treatment can be induced if there are grains of a certain orientation in the microstructure with local high restored energy. However, if the value of the local restored energy at a certain grain orientation is not greater than 1.1E0, there may be no abnormal grain growth in the microstructure.