Finite element simulation of laser additive melting and solidification of Inconel 718 with experimentally tested thermal properties

被引:70
作者
Andreotta, Richard [1 ]
Ladani, Leila [2 ]
Brindley, William [3 ]
机构
[1] Excel Technol Inc, Hartford, CT USA
[2] Univ Texas Arlington, Inst Predict Performance Methodol & Mech & Aerosp, Arlington, TX 76019 USA
[3] Pratt &Whitney, 400 Main St, E Hartford, CT 06118 USA
关键词
Laser melting; Powder bed; Finite element; Transient thermal analysis; Computational fluid dynamics; Inconel; 718; CONDUCTIVITY; EMISSIVITY;
D O I
10.1016/j.finel.2017.07.002
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
Powdered metal additive manufacturing technology shows great promise in the aerospace industry. Accurately simulating the associated processes will allow process windows and physical phenomena to be thoroughly investigated without the need for costly and time consuming experiments. The authors have expanded upon previous thermal finite element models by including mass and momentum balance equations which allow for the direct simulation of fluid flow in addition to thermal transport. This is accomplished by the incorporation of the forced rigidity method which utilizes a temperature dependent dynamic viscosity to model melting, flow, and subsequent solidification in all three spatial dimensions. This work includes a sophisticated finite element model that is validated with in-house experiments, as well as experimental determination of thermal conductivity of gas-atomized Inconel 718 powder particles. Through simulation and experimental findings a novel method of modeling the complete physics associated with powder bed additive manufacturing processes is presented.
引用
收藏
页码:36 / 43
页数:8
相关论文
共 27 条
[1]  
[Anonymous], 2012, 23 SOLID FREEFORM FA
[2]   Mechanical Properties of INCONEL 718 Parts Manufactured by Shaped Metal Deposition (SMD) [J].
Baufeld, Bernd .
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2012, 21 (07) :1416-1421
[3]   The mechanical and microstructural characteristics of laser-deposited IN718 [J].
Blackwell, PL .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2005, 170 (1-2) :240-246
[4]  
Bourell D.L., 2009, RAPIDTECH 2009 MAT U, P5
[5]   Measurement of viscosities of metals and alloys with an oscillating viscometer [J].
Brooks, RF ;
Day, AP ;
Andon, RJL ;
Chapman, LA ;
Mills, KC ;
Quested, PN .
HIGH TEMPERATURES-HIGH PRESSURES, 2001, 33 (01) :73-82
[6]  
Comsol, 2012, COMSOL MULT US GUID, P3
[7]   Finite Element Simulation of Selective Laser Melting process considering Optical Penetration Depth of laser in powder bed [J].
Foroozmehr, Ali ;
Badrossamay, Mohsen ;
Foroozmehr, Ehsan ;
Golabi, Sa'id .
MATERIALS & DESIGN, 2016, 89 :255-263
[8]  
Fu CH, 2014, 25 ANN INT SOL FREEF, P1129
[9]   Total hemispherical emissivity of oxidized Inconel 718 in the temperature range 300-1000°C [J].
Greene, GA ;
Finfrock, CC ;
Irvine, TF .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2000, 22 (3-4) :145-153
[10]   Additive manufacturing: Technology, applications and research needs [J].
Guo N. ;
Leu M.C. .
Frontiers of Mechanical Engineering, 2013, 8 (3) :215-243