Numerical simulation of thermal behavior during laser metal deposition shaping

来源期刊：中国有色金属学报(英文版)2008年第3期

论文作者：龙日升 刘伟军 邢飞 王华兵

文章页码：691 - 699

Key words：laser metal deposition shaping; thermal behavior; numerical simulation

Abstract: Based on the element life and death theory of finite element analysis(FEA), a three-dimensional multi-track and multi-layer model for laser metal deposition shaping(LMDS) was developed with ANSYS parametric design language(APDL), and detailed numerical simulations of temperature and thermal stress were conducted. Among those simulations, long-edge parallel reciprocating scanning method was introduced. The distribution regularities of temperature, temperature gradient, Von Mise’s effective stress, X-directional, Y-directional and Z-directional thermal stresses were studied. LMDS experiments were carried out with nickel-based superalloy using the same process parameters as those in simulation. The measured temperatures of molten pool are in accordance with the simulated results. The crack engendering and developing regularities of samples show good agreement with the simulation results.

基金信息：the Hi-tech Research and Development Program of China