摘要
采用焓方法对Nd:YAG脉冲激光导致的不锈钢材料表面熔凝过程的温度场进行了数值模拟。在此基础上,结合材料的结晶动力学和快速凝固理论,对材料微结构演化的几个重要参数,包括凝固速率、冷却速度和界面温度梯度做了估算和讨论。
Adopts the Enthalpy method to numerically simulate the temperature field of melting/solidification process in the surface layer of a stainless steel due to Nd:YAG pulsed laser treatment.With respect to the crystallization dynamics and rapid solidification theory, some essential parameters in relation to the microstructure evolution, such as solidification velocity, cooling speed and temperature gradient have been estimated and discussed.
出处
《中国科学院研究生院学报》
CAS
CSCD
2003年第3期309-315,共7页
Journal of the Graduate School of the Chinese Academy of Sciences
基金
国家自然科学基金(19891180)
中国科学院资助项目
关键词
激光快速熔凝
STEFAN问题
焓方法
温度场
微结构
不锈钢
rapid melting and solidification in laser process, Stefan problem,Enthalpy method, temperature field, microstructure evolution, stainless steel
