Technology specific geometric analysis of titanium alloy

Szerzők

  • Klaudia Kulcsár Győr
  • János Kónya

Kulcsszavak:

Titanium, Casting, Laser metal fusion, additive manufacturing

Absztrakt

This study introduces the specific geometric analysis of titanium alloys produced by casting and laser sintering. It extends to material structural problems that occur during casting and 3D printing. Furthermore, it reveals the aspects influencing geometrical features.

Casting process is based on lost-wax precision casting, where the model can be burned out from the embedding wax without the formation of sludge. The model can be designed and produced manually or virtually. This study extends to virtual-design computer models, because these can be examined exactly. Therefore the designed model can be compared to the real-life, produced model.

The complexity of lost-wax precision casting process can lead to errors. A significant problem is caused by thermal deformation, which originates from the silica-based ceramic material. Subsequently the material will not deform linearly and shape defects will occur. The other main cause is the metal’s solidification shrinkage during casting process, which can be directly measured after heat treatment. After 3D printing process (Laser Metal Fusion) of metals i.e. additive manufacturing, flaws can arise due to incorrect post-production heat treatment. This can result in remaining stresses in the material.

The additive manufacturing process generates shape defects originating from the melting of each layer. These shape defects can be excessive surface roughness and rounded corners. This study also compares the material structural features of the two manufacturing technologies.

Hivatkozások

[1] Keller, J. C., Draughn, R.A., Dougherty, W. J., & Wightman, J. P. (1988). Characterization of commercially pure Ti surfaces. J Dent Res 677 (SI): Abstract No. 1610.
[2] Draughn, R. A., Keller J. C., Wightman J.P., & Meletiou, S. D. (1989). Characterization of acid passivated cp Ti implant surfaces. J Dent Res 68 (SI): 276, Abstract No. 756.
[3] Swart, K. M., Keller, J. C., Wightman J. P., Draughn, R. A., Stanford, C. M, & Mechaels, C. M. (1992). Shortterm plasma-cleaning treatments enhance in vitro osteoblast attachment to titanium. J Oral Implantol 18 (2): 130-137.
[4] Keller, J. C., Weightman, J. P., & Draughn, R. A. (1991). Surface characterization of Ti-6Al-4V alloy surfaces. J Dent Res 70 (SI): 301, Abstract No. 285.
[5] Keller, J. C., Draughn, R. A., Wightman, J. P., Dougherty, W. K., & Meletiou, S. D. (1990). Characterization of sterilized CP titanium implant surfaces, Int J Oral Maxillofac Impltants 5 (4), 360-367.
[6] Stanford, C. M., Keller, J. C., & Solursh, M. (1994). Bone cell experession on titanium surfaces is altered by sterilization treatments. J Dent Res 73 (5), 1061-1071.
[7] Patel, M., Drake, D., & Keller, J. (1990). Bacterial adhesion to titanium implant surfaces: Developement of an in vitro model. J Dent Res 69 (SI):369, Abstract No. 2085.
[8] Wu-Yuan, C. D., Keller, J. C., & Eganhause, K. (1992). Oral bacterial accumulation on titanium surfaces with different textures. J Dent Res 71 (SI): 145, Abstract No. 314.
[9] Okazaki, K, Lee, W. H., Kim, D. K., & Kopczky, R. A. (1991). Physical characteristics of Ti-6Al-4V implants fabricated by electrodischarge compaction. J Biomed Mater Res 25 (12). 1417-1429.
[10] Kopoczyk, R., Sammon, P., Geisler, R., Okazaki, K., Kim, D., & Domenici, J. (1991). Comparison of porous titanium and Ti-6Al-4V implants, J Dent Res 70 (SI): 367, Abstract No. 811.
[11] Anderson, S., Drummond, J., Geissler, R., Okazaki, K., Kopczyk, R., Dominici, J., & Sammon, P. (1992). Osseointegration into porous titanium and titanium alloy implants. J Dent Res 71 (SI): 638, Abstract No. 980.
[12] Beahl, R. A. et al. (1956). Production of Castings. Bureau of Mines. 42.
[13] Eylon, D., & Froes, F. H. (1984). Titanium Casting – A Review. Titanium Net Shape Technologies. 155-178.
[14] Martin, L., (2002). The Investment Casting Institute. Advanced Materials and Processes, 160 (1), 49.
[15] Atkinson, H. V., & Davies, S. (2000).Fundamental Aspects of Hot Isostatic Pressing: An Overvies. Metallurgical and Materials Transactions. 31A (12), 2981.
[16] Magnuson J. (1977). Repair of Titanium Airframe Castings by Hot Isostatic Pressing. Metallography. 10, 223-232.
[17] Cotton J. D., Clark, L. P., Reinhard, T. R., & Spear, W. S. (2000). Inclusions in Ti-6Al-4V Investment Castings. Presentation at the AIAA Conference, Atalanta, paper AIAA-2000-1464.
[18] Veeck, S., Lee, D., & Tom, T. (2002). Titanium Investment Casting Advanced Materials and Processes, 160(1), 59-62.
[19] Levy, G. N. (2010) The role and future of the Laser Technology in the Additive Manufacturing environment. Physics Procedia, 5, 65-80.
[20] Kruth, J. (1991) Material Incress Manufacturing by Rapid Prototyping Techniques. CIRP Annals – Manufacturing Technology, 40, 603-614.
[21] Kruth, J. P., Levy, G., Klocke, F., & Childs, T. H. C. (2007). Consolidation phenomena in laser and powder-bed based layered manufacturing. CIRP Ann-Manuf. Technol., 56, 730-759.
[22] Vrancken, B., Thijs, L., Kruth, J. P., & Humbeeck, J. V. (2012). Heat treatment of Ti6Al4V produced by Selective Laser Melting: Microstructure and Mechanical properties. Journal of Alloys and Compounds, 514, 177-185.
[23] Murr, L. E., Quinoses, A., Gaytan, S. M., Lopez, M. I., Rodela, A., Martinez, E. Y., Hernandez, D. H., Materinez, E., Medina, F. & Wicker, R. B. (2009). Microstructure and mechanical behavior of Ti-6Al-4V produced by rapid-layer manufacturing, for biomedical applications. Journal of the Mechanical Behavior of Biomedical Materials, 20-32.
[24] Facchini, L., Magalini, E., Robitti, P., Molinari, A., Hoges, S., & Wissenbach, K. (2010). Ductility of a Ti-6Al-4V alloy produced by selective laser melting of prealloyed powders. Rapid Prototyping J., 16, 450-459.
[25] Facchini, L., Magalini, E., Robitti, P., & Molinari, A. (2009). Microstructure and mechanical properties of Ti-6Al-4V produced by electron beam melting of pre-alloyed powders. Rapid Protoyping J., 151, 171-178.
[26] Thijs, L., Verhaeghe, F., Craeghs, T., Van Humbeeck J., & Kurth, J. P. (2010). A study of the micro structural evolution during selective laser melting of the Ti-6Al-4V. Acta Mater, 58, 3303-3312.
[27] Chlebus, E., Kuźnicka, B. A.,Kurzynowski T., & DybaŠB. A. (2011). Microstructure mechanical behaviour of Ti―6Al―7Nb alloy produced by selective laser melting. Mater. Charact., 62, 488-495.
[28] Morgan, R., Sutcliffe, C. J., & O’Neill, W. (2004). Density analysis of direct metal laser remeltred 316L stainless steel cubic primitives. Journal of Materials Science, 39, 1195-1205.
[29] Yadroitsev I., & Smurov, I. (2011). Surface Morphology in Selective Laser Melting of Metal Powders. Lasers in Manufacturing 2011: Proceedings of the Sixth International Wlt Conference on Lasers in Manufacturing, Vol 12, Pt A, vol. 12., Amsterdam: Elseiver Science Bv, 264-270.
[30] Yasa, E., Deckers, J., & Kruth, J. P. (2011). The investigation of the influence of laser remelting on density, surface quality and microstructure of selective laser melting parts. Rapid Prototyping J., 17, 312-327.
[31] Spiering, A. B., Herres, N., & Kruth, J. P. (2011). Influence of the particle size distribution on surface quality and mechanical properties in AM steel parts. Rapid Prototyping J. , 17, 195-202.
[32] Van Vaerenbergh, J. (2008). Process optimisation in Selective Laser Melting. vol. PhD. Twente: Inversity of Twente.
[33] Mercelis, P., & Kruth, J. P. (2006). Residual stresses in selective laser sinterung and selective laser melting. Rapid Prototyping J., 12, 254-265.
[34] Vandenbroucke, B. (2008). Selective Laser Melting of Biocompatible Metals for Rapid Manufacturing of Medical Parts. vol. PhD. Leuven: KU Leuven, 2008.

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Megjelent

2018-01-20

Folyóirat szám

Évf. 1 szám 1 (2018): Bánki Közlemények Spring (2018)

Rovat

Materials Science and Technology (Anyagtudomány és Technológia)

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