Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-03T08:38:48.645Z Has data issue: false hasContentIssue false
  • English
  • Français

Thermal behavior and formation mechanism of a typical micro-scale node-structure during selective laser melting of Ti-based porous structure

Published online by Cambridge University Press:  18 April 2017

Chenglong Ma ,
Dongdong Gu ,
Kaijie Lin  and
Wenhua Chen
Chenglong Ma
Affiliation:
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China; and Institute of Additive Manufacturing (3D Printing), Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Dongdong Gu*
Affiliation:
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China; and Institute of Additive Manufacturing (3D Printing), Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Kaijie Lin
Affiliation:
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China; and Institute of Additive Manufacturing (3D Printing), Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
Wenhua Chen
Affiliation:
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China; and Institute of Additive Manufacturing (3D Printing), Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

Selective laser melting (SLM) technology efficiently solves the current manufacturing challenges of high-performance porous structure components, due to its freeform fabrication principle. As the most basic and crucial structure element, the nodes of porous structure component play an important role in its mechanical property. In this study, finite element method was used to investigate the thermal behavior during SLM processing of micro-scale node-structure. The dynamic size of molten pool was continuously predicted and consequently the typical “necking” effect was found, which was consistent with the experiment results. Besides, the influence of laser scan speed on temperature and temperature gradient of molten pool was also analyzed. The results indicated that the “necking” effect became more conspicuous with the applied scan speed increasing, which significantly deteriorated the mechanical property of porous structure components.

Keywords

selective laser meltingporous structurenode-structure“necking” effect
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 8 , 28 April 2017 , pp. 1506 - 1516
Check for updates
Copyright
Copyright © Materials Research Society 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

Contributing Editor: Jürgen Eckert

References

REFERENCES

Čapek, J., Machová, M., Fousová, M., Kubásek, J., Vojtěch, D., Fojt, J., Jablonská, E., Lipov, J., and Ruml, T.: Highly porous, low elastic modulus 316L stainless steel scaffold prepared by selective laser melting. Mater. Sci. Eng., C 69, 631 (2016).CrossRefGoogle ScholarPubMed
Colombo, P., Dunand, D.C., and Kumar, V.: Porous materials: Less is more. J. Mater. Res. 28, 2187 (2013).Google Scholar
Li, S., Hassanin, H., Attallah, M.M., Adkins, N.J.E., and Essa, K.: The development of TiNi-based negative Poisson’s ratio structure using selective laser melting. Acta Mater. 105, 75 (2016).Google Scholar
Vendange, V. and Colomban, P.: How to tailor the porous structure of alumina and aluminosilicate gels and glasses. J. Mater. Res. 11, 518 (1996).Google Scholar
Leary, M., Mazur, M., Elambasseril, J., McMillan, M., Chirent, T., Sun, Y., Qian, M., Easton, M., and Brandt, M.: Selective laser melting (SLM) of AlSi12Mg lattice structures. Mater. Des. 98, 344 (2016).Google Scholar
Wang, D., Yang, Y., Liu, R., Xiao, D., and Sun, J.: Study on the designing rules and processability of porous structure based on selective laser melting (SLM). J. Mater. Process. Technol. 213, 1734 (2013).Google Scholar
Simonelli, M., Tse, Y.Y., and Tuck, C.: The formation of alpha plus beta microstructure in as-fabricated selective laser melting of Ti–6Al–4V. J. Mater. Res. 29, 2028 (2014).CrossRefGoogle Scholar
Gu, D.D.: Laser Additive Manufacturing of High-performance Materials (Springer-Verlag, Berlin Heidelberg, 2015); pp. 175–198.CrossRefGoogle Scholar
Ma, C., Gu, D., Dai, D., Chen, W., Chang, F., Yuan, P., and Shen, Y.: Aluminum-based nanocomposites with hybrid reinforcements prepared by mechanical alloying and selective laser melting consolidation. J. Mater. Res. 30, 2816 (2015).Google Scholar
Gu, D.D.: Materials creation adds new dimensions to 3D printing. Sci. Bull. 61, 1718 (2016).Google Scholar
Maskery, I., Aboulkhair, N.T., Aremu, A.O., Tuck, C.J., Ashcroft, I.A., Wildman, R.D., and Hague, R.J.M.: A mechanical property evaluation of graded density Al–Si10–Mg lattice structures manufactured by selective laser melting. Mater. Sci. Eng., A 670, 264 (2016).CrossRefGoogle Scholar
Haberland, C., Elahinia, M., Walker, J.M., Meier, H., and Frenzel, J.: On the development of high quality NiTi shape memory and pseudoelastic parts by additive manufacturing. Smart Mater. Struct. 23, 104002 (2014).Google Scholar
Liu, Y.J., Li, S.J., Wang, H.L., Hou, W.T., Hao, Y.L., Yang, R., Sercombe, T.B., and Zhang, L.C.: Microstructure, defects and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting. Acta Mater. 113, 56 (2016).Google Scholar
Gorny, B., Niendorf, T., Lackmann, J., Thoene, M., Troester, T., and Maier, H.J.: In situ characterization of the deformation and failure behavior of non-stochastic porous structures processed by selective laser melting. Mater. Sci. Eng., A 528, 7962 (2011).Google Scholar
Ostendorf, A., Neumeister, A., Dudziak, S., Passinger, S., and Stampfl, J.: Micro- and Nano-parts Generated by Laser-based Solid Freeform Fabrication (Woodhead Publishing Limited, Cambridge, 2010); pp. 695–734.Google Scholar
Promoppatum, P., Onler, R., and Yao, S.: Numerical and experimental investigations of micro and macrocharacteristics of direct metal laser sintered Ti–6Al–4V products. J. Mater. Process. Technol. 240, 262 (2017).CrossRefGoogle Scholar
Dai, K. and Shaw, L.: Thermal and mechanical finite element modeling of laser forming from metal and ceramic powders. Acta Mater. 52, 69 (2004).Google Scholar
Li, Y. and Gu, D.: Thermal behavior during selective laser melting of commercially pure titanium powder: Numerical simulation and experimental study. Addit. Manuf. 1–4, 99 (2014).Google Scholar
Fu, C.H. and Guo, Y.B.: Three-dimensional temperature gradient mechanism in selective laser melting of Ti–6Al–4V. J. Manuf. Sci. Eng. 136, 061004 (2014).Google Scholar
Zhang, D.Q., Cai, Q.Z., Liu, J.H., and Li, R.D.: A powder shrinkage model for describing real layer thickness during selective laser melting process. Adv. Mater. Res. 97–101, 3820 (2010).Google Scholar
Kruth, J.P., Levy, G., Klocke, F., and Childs, T.H.C.: Consolidation phenomena in laser and powder-bed based layered manufacturing. CIRP Ann. Manuf. Technol. 56, 730 (2007).Google Scholar