Influence of the hatching strategy on consolidation during selective electron beam melting of Ti-6Al-4V
Selective electron beam melting is a promising powder-based additive manufacturing process offering a multitude of parameters to influence the melting process. In the presented work, the energy input, given by the beam power, scan speed, and hatch spacing, is investigated regarding their influence on the heat distribution, chemical composition, and surface roughness. Experiments and numerical simulations with the lattice Boltzmann method were performed to achieve a profound understanding. Process maps dependent on beam power and scan speed for different hatch spacings were developed. The influence of process parameters on the chemical composition, surface roughness, and heat-affected zone was investigated. The experimental results are explained with the help of numerical simulations by the temperature profile during hatching.
KeywordsSelective electron beam melting Ti-6Al-4V Hatching strategy Chemical composition
Unable to display preview. Download preview PDF.
- 1.Baumers M, Tuck C, Wildman R, Ashcroft I, Hague R (2011) Energy inputs to additive manufacturing: does capacity utilization matter? In: 22nd annual international solid freeform fabrication symposium - an additive manufacturing conference, SFFGoogle Scholar
- 4.Murr L, Quinones S, Gaytan S, Lopez M, Rodela A, Martinez E, Hernandez D, Martinez E, Medina F, Wicker R (2009) Microstructure and mechanical behavior of ti-6al-4v produced by rapid-layer manufacturing, for biomedical applications. J Mech Behav Biomed Mater 2(1):20–32. doi: 10.1016/j.jmbbm.2008.05.004 CrossRefGoogle Scholar
- 9.Scharowsky T, Juechter V, Singer RF, Körner C (2015) Influence of the scanning strategy on the microstructure and mechanical properties in selective electron beam melting of ti–6al–4v. Adv Eng Mater. doi:10.1002/adem.201400542
- 11.Ackelid U, Svensson M Additive manufacturing of dense metal parts by electron beam melting, materials science and technology conference and exhibition 2009, MS and t’09 4Google Scholar
- 12.DIN German Institute for Standardization Din 17851 - Titanium alloys; chemical composition (1990-11-00)Google Scholar
- 14.DIN German Institute for Standardization Din en iso 4287 - Geometrical product specifications (gps) - surface texture: profile method - terms, definitions and surface texture parameters (2010-07)Google Scholar
- 15.DIN German Institute for Standardization Din en iso 4288 - Geometrical product specifications (gps) - surface texture: profile method - rules and procedures for the assessment of surface texture (1998-04)Google Scholar
- 19.Markl M, Ammer R, Ljungblad U, Rüde U, Körner C (2013) Electron beam absorption algorithms for electron beam melting processes simulated by a three-dimensional thermal free surface lattice Boltzmann method in a distributed and parallel environment. In: 2013 international conference on computational science, vol 18, pp 2127–2136. doi:10.1016/j.procs.2013.05.383
- 21.Ammer R, Markl M, Ljungblad U, Körner C, Rüde U (2014) Simulating fast electron beam melting with a parallel thermal free surface lattice Boltzmann method. In: Mesoscopic methods for engineering and science (proceedings of ICMMES-2012, Taipei, Taiwan, 23–27 July 2012), vol 67(2), pp 318–330. doi:10.1016/j.camwa.2013.10.001
- 22.Klassen A, Bauereiß A, Körner C (2014) Modelling of electron beam absorption in complex geometries. J Phys D Appl Phys 47(6). doi:10.1088/0022-3727/47/6/065307