Prediction of lack-of-fusion porosity for powder bed fusion
Source abstract
Abstract
Abstract A geometry-based simulation is used to predict porosity caused by insufficient overlap of melt pools (lack of fusion) in powder bed fusion. The inputs into the simulation are hatch spacing, layer thickness, and melt-pool cross-sectional area. Melt-pool areas used in the simulations can be obtained from experiments, or estimated with the analytical Rosenthal equation. The necessary material constants, including absorptivity for laser-based melting, have been collated for alloy steels, aluminum alloys and titanium alloys. Comparison with several data sets from the literature shows that the simulations correctly predict process conditions at which lack-of-fusion porosity becomes apparent, as well as the rate at which porosity increases with changes in process conditions such as beam speed, layer thickness and hatch spacing.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Welding Techniques and Residual Stresses · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. Analysis of defect generation in Ti–6Al–4V parts made using powder bed fusion additive manufacturing processes
2. Influences of energy density on porosity and microstructure of selective laser melted 17- 4PH stainless steel
3. Microstructures and mechanical properties of A356 (AlSi7Mg0.3) aluminum alloy fabricated by selective laser melting10.1016/j.matdes.2015.10.065 ↗
4. AWS A2 Committee on Definitions and Symbols · 2009
5. Geometric model to predict porosity of part produced in powder bed system
6. On the formation of AlSi10Mg single tracks and layers in selective laser melting: Microstructure and nano-mechanical properties10.1016/j.jmatprotec.2015.11.016 ↗
7. Single track formation in selective laser melting of metal powders10.1016/j.jmatprotec.2010.05.010 ↗
8. Jones · 2001
9. Investigation of the laser-powder-atmosphere interaction zone during the selective laser melting process10.1016/j.jmatprotec.2015.05.008 ↗
10. Temperature distribution and melt geometry in laser and electron-beam melting processes – A comparison among common materials
11. Process mapping for qualification across multiple direct metal additive manufacturing processes
12. Mathematical theory of heat distribution during welding and cutting
13. Rapid solidification: selective laser melting of AlSi10Mg10.1007/s11837-015-1763-3 ↗
14. Fine-structured aluminium products with controllable texture by selective laser melting of pre-alloyed AlSi10Mg powder10.1016/j.actamat.2012.11.052 ↗
15. The investigation of the influence of laser re-melting on density, surface quality and microstructure of selective laser melting parts10.1108/13552541111156450 ↗
16. Physical processes in fusion welding10.1103/RevModPhys.67.85 ↗
17. Processing AlSi10Mg by selective laser melting: parameter optimisation and material characterisation10.1179/1743284714Y.0000000702 ↗
18. Melt pool characterization for selective laser melting of Ti-6Al-4V pre-alloyed powder
19. 2017
20. Mills · 2002
21. W.E. King, A.T. Anderson, R.M. Ferencz, N.E. Hodge, C. Kamath, S.A. Khairallah, A.M. Rubenchik, Laser powder bed fusion additive manufacturing of metals; physics, computational, and materials challenges, Appl. Phys. Rev. 2 (2015) 041304, 1–26, http://dx.doi.org/10.1063/1.4937809.10.1063/1.4937809 ↗
22. Formation and reduction of hydrogen porosity during selective laser melting of AlSi10Mg10.1016/j.jmatprotec.2015.02.013 ↗
23. On the effect of process parameters on properties of AlSi10Mg parts produced by DMLS10.1108/RPJ-03-2013-0028 ↗
24. Heat transfer and fluid flow during keyhole mode laser welding of tantalum, Ti-6Al-4V, 304L stainless steel and vanadium10.1088/0022-3727/40/18/037 ↗
25. A.V. Gusarov, I. Yadroitsev, P. Bertrand, I. Smurov, Model of radiation and heat transfer in laser-powder interaction zone at selective laser melting, J. Heat Transf. 131 (2009) 072101, 1–10, http://dx.doi.org/10.1016/j.phpro.2010.08.065.10.1115/1.3109245 ↗
26. Lasers and materials in selective laser sintering10.1108/01445150310698652 ↗
27. Mesoscopic simulation model of selective laser melting of stainless steel powder10.1016/j.jmatprotec.2014.06.001 ↗
28. Observation of keyhole-mode laser melting in laser powder-bed fusion additive manufacturing10.1016/j.jmatprotec.2014.06.005 ↗
29. Reducing porosity in AlSi10Mg parts processed by selective laser melting
30. A pragmatic model for selective laser melting with evaporation10.1016/j.actamat.2009.08.027 ↗
31. M. Badrossamay, E. Yasa, J. Van Vaerenbergh, J.P. Kruth, Improving productivity rate in SLM of commercial steel powders, In: Presented at RAPID 2009 Conf. & Expo., Schaumburg, IL, USA (2009) TP 09PUB17 1–13.
32. On the role of melt flow into the surface structure and porosity development during selective laser melting10.1016/j.actamat.2015.06.004 ↗
33. Microstructure and tensile properties of selectively laser-melted and of HIPed laser-melted Ti-6Al-4V10.1016/j.msea.2013.04.099 ↗
34. Design optimization of supports for overhanging structures in aluminum and titanium alloys by selective laser melting10.1016/j.matdes.2014.07.043 ↗
35. Current issues and problems in laser welding of automotive aluminium alloys10.1179/095066099101528298 ↗