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将蒙特卡罗(MC)技术引入到晶粒生长模拟中,结合焊接工艺试验和热模拟试验,模拟了单相合金焊接热影响区(HAZ)晶粒生长过程。首先应用实验和统计学的方法确定了材料晶粒生长的动力学模型,然后计算了焊接热循环,同时基于蒙特卡罗技术编制了模拟程序。最后在不同焊接热输入情况下,模拟了晶粒生长过程。模拟结果动态演示了晶粒生长过程,并且体现了焊接热钉扎效应。模拟得出数据与试验结果非常接近,为评定焊接工艺和材料可焊性提供了依据。
The Monte Carlo (MC) technology was introduced into the grain growth simulation, and the welding process and thermal simulation tests were used to simulate the grain growth in the heat affected zone (HAZ) of a single phase alloy. Firstly, the dynamic model of grain growth was established experimentally and statically, and then the thermal cycle of welding was calculated. At the same time, the simulation program was compiled based on Monte Carlo technique. Finally, under different welding heat input, the grain growth process was simulated. The simulation results dynamically demonstrate the grain growth process and reflect the welding thermal pinning effect. The simulation results show that the data is very close to the experimental results, which provides a basis for assessing the welding process and material weldability.