Effect of process parameters on the density and porosity of laser melted AlSi10Mg/SiC metal matrix composite

Abstract

Laser melting of aluminium alloy—AlSi10Mg has increasingly been used to create specialised products in various industrial applications, however, research on utilising laser melting of aluminium matrix composites in replacing specialised parts have been slow on the uptake. This has been attributed to the complexity of the laser melting process, metal/ceramic feedstock for the process and the reaction of the feedstock material to the laser. Thus, an understanding of the process, material microstructure and mechanical properties is important for its adoption as a manufacturing route of aluminium metal matrix composites. The effects of several parameters of the laser melting process on the mechanical blended composite were thus investigated in this research. This included single track formations of the matrix alloy and the composite alloyed with 5% and 10% respectively for their reaction to laser melting and the fabrication of density blocks to investigate the relative density and porosity over different scan speeds. The results from these experiments were utilised in determining a process window in fabricating near-fully dense parts.

Key words： selective laser melting; additive manufacturing; mechanical alloying; powder metallurgy; aluminium metal matrix composite

References

1 Scudino S, Liu G, Prashanth K G, Mechanical properties of Al-based metal matrix composites reinforced with Zr-based glassy particles produced by powder metallurgy. Acta Materialia, 2009, 57(6): 2029–2039

2 Ibrahim I A, Mohamed F A, Lavernia E J. Particulate reinforced metal matrix composites—A review. Journal of Materials Science, 1991, 26(5): 1137–1156

3 Surappa M K. Aluminium matrix composites: Challenges and opportunities. Sadhana, 2003, 28(1–2): 319–334

4 Rosso M. Ceramic and metal matrix composites: Routes and properties. Journal of Materials Processing Technology, 2006, 175(1–3): 364–375

5 Campanelli S L, Contuzzi N, Angelastro A, Capabilities and performances of the selective laser melting process. In: Lian Z C, ed. New Trends in Technologies: Devices, Computer, Communication and Industrial Systems. IntechOpen, 2010

6 Famodimu O H, Stanford M, Zhang L, Selective laser melting of aluminium metal matrix composite. In: Proceedings of the 24th International Conference on Flexible Automation and Intelligent Manufacturing (FAIM). San Antonio: DEStech Publications, 2014, 739–745

7 Shellabear M, Nyrhila O. DMLS—Development history and state of the art. In: Proceedings of Laser Assisted Net Shape Engineering (LANE). Erlangen, 2004, 393–404

8 Bineli A R R, Peres A P G, Jardini A L, Direct metal laser sintering (DMLS): Technology for design and construction of microreactors. In: Proceedings of 6th Brazilian Conference on Manufacturing Engineering. Caxias do Sul, 2011

9 EOS Gmbh. EOS Aluminium AlSi10Mg for EOSINT M270. 2011. Retrieved from https://cdn3.scrvt.com/eos/public/8837de942d 78d3b3/4e099c3a857fdddca4be9d59fbb1cd74/EOS_Aluminium_ AlSi10Mg_en.pdf. 2017-3-30

10 Smith W F. Principles of Materials Science and Engineering. 3rd ed. New York: McGraw Hill, 1986

11 Torralba J, Da-Costa C, Velasco F. P/M aluminium matrix composites: An overview. Journal of Materials Processing Technology, 2003, 133(1–2): 203–206

12 Olowofela O H, Lyall I, Stanford M, Mechanical alloying (MA) of composite materials for the laser melting (LM) process. In: Proceedings of the 21st Annual International Conference on Composites or Nano Engineering. Tenerife, 2013

13 Simchi A, Godlinski D. Effect of SiC particles on the laser sintering of Al-7Si-0.3Mg alloy. Scripta Materialia, 2008, 59(2): 199–202

14 Kempen K, Thijs L, Yasa E, Process optimization and microstructural analysis for selective laser melting of AlSi10Mg. In: Proceedings of Solid Freeform Fabrication Symposium. 2011, 484–495

15 Yadroitsev I, Bertrand Ph, Smurov I. Parametric analysis of the selective laser melting process. Applied Surface Science, 2007, 253(19): 8064–8069

16 Kyogoku H, Hagiwara M, Shinno T. Freeform fabrication of aluminium alloy prototypes using laser melting. Laser, 2010, 10: 140–148

17 Yadroitsev I, Gusarov A, Yadroitsava I, Single track formation in selective laser melting of metal powders. Journal of Materials Processing Technology, 2010, 210(12): 1624–1631

18 Drezet J M, Pellerin S, Bezencon C, Modelling the Marangoni convection in laser heat treatment. Journal de Physique IV (Proceedings), 2004, 120: 299–306

19 Simchi A, Pohl H. Effects of laser sintering processing parameters on the microstructure and densification of iron powder. Materials and Engineering A, 2003, 359(1–2): 119–128

20 Spierings A B, Schneider M, Eggenberger R. Comparison of density measurement techniques for additive manufactured metallic parts. Rapid Prototyping Journal, 2011, 17(5): 380–386

21 Spierings A B, Herres N, Levy G. Influence of the particle size distribution on surface quality and mechanical properties in AM steel parts. Rapid Prototyping Journal, 2011, 17(3): 195–202

22 Louvis E, Fox P, Sutcliffe C J. Selective laser melting of aluminium components. Journal of Materials Processing Technology, 2011, 211(2): 275–284

23 Pang S, Chen X, Zhou J, 3D transient multiphase model for keyhole, vapor plume, and weld pool dynamics in laser welding including the ambient pressure effect. Optics and Lasers in Engineering, 2015, 74: 47–58

24 Osakada K, Shiomi M. Flexible manufacturing of metallic products by selective laser melting of powder. International Journal of Machine Tools and Manufacture, 2006, 46(11): 1188–1193

25 Manfredi D, Calignano F, Krishnan M, From powders to dense metal parts: Characterization of a commercial AlSiMg alloy processes through direct metal laser sintering. Materials (Basel), 2013, 6(3): 856–869

26 Kempen K, Thijs L, Van Humbeeck J, Mechanical properties of AlSi10Mg produced by selective laser melting. Physics Procedia, 2012, 39: 439–446

27 Dinda G P, Dasgupta A K, Mazumder J. Evolution of microstructure in laser deposited Al-11.28%Si alloy. Surface and Coatings Technology, 2012, 206(8–9): 2152–2160

28 Flemings M C. Coarsening in solidification processing. Materials Transactions, 2005, 46(5): 895–900

29 Spear R E, Gardner G R. Dendrite cell size. AFS Transactions, 1963, 71: 209–215

30 Sigworth G K. Fundamentals of solidification in aluminum castings. International Journal of Metalcasting, 2014, 8(1): 7–20

31 Manfredi D, Calignano F, Krishnan M, Additive manufacturing of Al alloys and aluminium matrix composites (AMCs). In: Monteiro W A, ed. Light Metal Alloys Applications. IntechOpen, 2014