{"title":"Texture and Twinning in Selective Laser Melting Ti-6Al-4V Alloys","authors":"N. Kazantseva, P. Krakhmalev, I. Yadroitsev, A. Fefelov, N. Vinogradova, I. Ezhov, T. Kurennykh","volume":131,"journal":"International Journal of Materials and Metallurgical Engineering","pagesStart":769,"pagesEnd":773,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10008207","abstract":"
Martensitic texture-phase transition in Selective Laser Melting (SLM) Ti-6Al-4V (ELI) alloys was found. Electron Backscatter Diffraction (EBSD) analysis showed the initial cubic beta < 100 > (001) BCC texture. Such kind of texture is observed in BCC metals with flat rolling texture when axis is in the direction of rolling and the texture plane coincides with the plane of rolling. It was found that the texture of the parent BCC beta-phase determined the texture of low-temperature HCP alpha-phase limited the choice of its orientation variants. The {10-12} < -1011 > twinning system in titanium alloys after SLM was determined. Analysis of the oxygen contamination in SLM alloys was done. Comparison of the obtained results with the conventional titanium alloys is also provided.<\/p>\r\n","references":"[1]\tA.M. Beese, B.E. Carroll,\u201d Review of mechanical properties of Ti-6Al-4V made by laser-based additive manufacturing using powder feedstock\u201d, JOM, vol. 68, pp. 724-734, 2016.\r\n[2]\tE. Wielewski, C. R. Siviour and N. Petrinic, \u201cOn the correlation between macrozones and twinning in Ti\u20136Al\u20134V at very high strain rates,\u201d Scripta Materialia, vol. 67, pp. 229\u2013232, 2012.\r\n[3]\tM. Simonelli, Y. Y. Tse, C.Tuck, \u201cFurther understanding of Ti-6Al-4V selective laser melting using texture analysis\u201d, Journal of Physics : Conference Series, vol.371, pp.1-4, 2012. \r\n[4]\tH. Miura, Y. Itoh, , T. Ueamtsu, K. Sato, \u201cThe influence of density and oxygen content on the mechanical properties of injection molded Ti-6Al-4V alloys\u201d, Advances in Powder Metallurgy and Particulate Materials, vil.1, pp.46-53, 2010. \r\n[5]\tA. M. Bauristhene, K. Mutombo, W .E. Stumpf, \u201cAlpha case formation mechanism in Ti-6Al-4V alloy investment castings using YFSZ shell moulds\u201d, Journal of the Southern African Institute of Mining and Metallurgy, vol.113, pp.357-361, 2013.\r\n[6]\tW. Tirry, F. Coghe, L. Rabet and D. Schryvers, \u201cMulti-scale observations of deformation twins in Ti6Al4V\u201d in EMC, vol. 2: Materials Science, S. Richter, A. Schwedt, Ed., 2008, , pp. 499\u2013500.\r\n[7]\tJ. Peirsa, W. Tirryb, B. Amin-Ahmadib, F. Coghec, P. Verleysena, L. Rabetc, D. Schryversb, J. Degriecka, \u201cMicrostructure of adiabatic shear bands in Ti6Al4V\u201d, Materials characterization, vol.75, pp.79 -92, 2013.\r\n[8]\tP. Krakhmalev, G. Fredricsson, I.Yadroitseva, N. Kazantseva, A. Du Plessis, I.Yadroitsev, \u201cDeformation Behavior and Microstructure of Ti6Al4V Manufactured by SLM\u201d, Physics Procedia, vol. 83, pp. 778 \u2013 788, 2016.\r\n[9]\tL. Bao, C. Schuman, J-S.Lecomte, M-J. Philippe, X. Zhao and C. Esling, \u201cA Study of Twin Variant Selection and Twin Growth in Titanium\u201d, Advanced engineering materials. vol.13, no. 10, pp.928-932. 2011.\r\n[10]\tI.V. Egis, A. A. Barbeko, A. I. Horev, M. M. Martinova, E. B. Samarin, \u201cBasic texture formation in VT18u titanium alloy\u201d, Metal Science and Heat Treatment, no 6, pp. 1-7, 1992.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 131, 2017"}