摘要
引入遗传算法模拟了基于45钢交流闪光对焊焊接的实测温度场的焊接热影响区的奥氏体晶粒长大演化过程.应用遗传算法模拟晶粒长大时,同时考虑了系统能量最低和晶界向曲率半径方向迁移两大要素.该焊接热影响区的粗晶区和细晶区实测平均晶粒半径r分别为54.30,13.58μm,与遗传算法模拟所得的平均晶粒半径51.50μm和16.29μm结果相近.遗传算法模拟结果表明了焊接热循环过程中存在的温度梯度,使得焊接热影响区中的晶粒长大平均半径r仅为整体加热时晶粒平均半径r的66.8%.
The austenite grain growth process of 45 steel in AC flash butt welding heat-affected zone(HAZ)was simulated by genetic algorithm method based on actual measured welding thermal cycle curves,which the energy of the system in minimum state and the grain boundary moved to curvature direction in grain growth process were considered.The average radius actually measured in coarse grain area and fine grain area of welding HAZ are 54.30 μm and 13.58 μm,and agree with the average grain radius of 51.50 μm and 16.29 μm simulated by genetic algorithm simulation method.Genetic algorithm method results show the average radius of grain growth in welding HAZ during welding heat recycles is 66.8 percent of that during the whole heat.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第6期79-82,86,共5页
Transactions of The China Welding Institution
关键词
遗传算法
晶粒长大
焊接热影响区
模拟
genetic algorithm
grain growth
welding heat-affected zone
simulation
