摘要
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.
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.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2008年第3期691-699,共9页
Transactions of Nonferrous Metals Society of China
基金
Project(2002AA420060) supported by the Hi-tech Research and Development Program of China
关键词
激光金属沉积
热处理
数字模式
成型方式
laser metal deposition shaping
thermal behavior
numerical simulation
