机械科学与技术2025，Vol.44Issue(10)：1732-1737,6.DOI:10.13433/j.cnki.1003-8728.20230360
TA15钛合金L-PBF成形过程气孔数值模拟及工艺参数研究
Numerical Simulation of Porosity and Processing Parameters in L-PBF Forming of TA15 Titanium Alloy
摘要
Abstract
Laser powder bed fusion(L-PBF)with point-by-point,line-by-line,body-by-body forming often produces defects and that are difficult to control,and porosity is one of the typical defects that affect the quality of L-PBF formed parts.Therefore,the study on the porosity defects is necessary to improve the mechanical properties of L-PBF formed parts.A numerical model for mesoscopic scale of the melt pool in the L-PBF forming of TA15 titanium alloy is established based on the discrete element method(DEM),and the volume of fluid(VOF)method is used to trace the free surface of the melt pool for simulation,and the computational fluid dynamics(CFD)FLOW-3D software is used to simulate the porosity defects in the L-PBF forming of TA15 titanium alloy.The effect of the laser power P and scanning speed v on the melt pool porosity defects was investigated.The results show that as the laser power increases and the scanning speed decreases,the melt pool depth tends to increase and the number of pores increases,and the laser energy density threshold for pores in the melt pool is E=0.043 3 MJ/(m·s1/2).关键词
数值模拟/激光粉末床熔融/气孔/钛合金Key words
numerical simulation/laser powder bed fusion/porosity/titanium alloy分类
金属材料引用本文复制引用
杨来侠,戴杰,慎松,张恒,李庆宇,陈祯..TA15钛合金L-PBF成形过程气孔数值模拟及工艺参数研究[J].机械科学与技术,2025,44(10):1732-1737,6.基金项目
陕西省教育厅2022年度服务地方专项科研计划(22JC053)与陕西省教育科学"十四五"规划2021年度课题(SGH21Y0522) （22JC053）
