Abstract
The effects of Cr and Fe addition on the mechanical properties of Ti–6Al–4V alloys prepared by direct energy deposition were investigated. As the Cr and Fe concentrations were increased from 0 to 2 mass%, the tensile strength increased because of the fine-grained equiaxed prior β phase and martensite. An excellent combination of strength and ductility was obtained in these alloys. When the Cr and Fe concentrations were increased to 4 mass%, extremely fine-grained martensitic structures with poor ductility were obtained. In addition, Fe-added Ti–6Al–4V resulted in a partially melted Ti–6Al–4V powder because of the large difference between the melting temperatures of the Fe eutectic phase (Ti–33Fe) and the Ti–6Al–4V powder, which induced the formation of a thick liquid layer surrounding Ti–6Al–4V. The ductility of Fe-added Ti–6Al–4V was thus poorer than that of Cr-added Ti–6Al–4V.
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References
S. Zhang, X. Lin, J. Chen, W. Huang, Chin. Opt. Lett. 7, 498–501 (2009)
L. Yang, K. Hsu, B. Baughman, D. Godfrey, F. Medina, M. Menon, S. Wiener, Additive Manufacturing of Metals: The Technology, Materials, Design and Production (Springer, London, 2017), p. 24
F. Caiazzo, Opt. Laser Technol. 103, 193–198 (2018)
K. Zhang, S. Wang, W. Liu, X. Shang, Mater. Des. 55, 104–119 (2014)
B. Baufeld, O.V.D. Biest, R. Gault, Mater. Des. 31, S106–S111 (2010)
J. Yu, M. Rombouts, G. Maes, F. Motmans, Phys. Proc. 39, 416–424 (2012)
B.J. Hayes, B.W. Martin, B. Welk, S.J. Kuhr, T.K. Ales, D.A. Brice, I. Ghamarian, A.H. Baker, C.V. Haden, D.G. Harlow, H.L. Fraser, P.C. Collins, Acta Mater. 133, 120–133 (2017)
J.H. Martin, B.D. Yahata, J.M. Hundley, J.A. Mayer, T.A. Schaedler, T.M. Pollock, Nature 549, 365–369 (2017)
C. Schneider-Maunoury, L. Weiss, P. Acquier, D. Boisselier, P. Laheurte, Addit. Manuf. 17, 55–66 (2017)
Y. Itoh, H. Miura, T. Uematsu, T. Osada, K. Sato, J. Solid Mech. Mater. Eng. 3, 921–930 (2009)
T. Ahmed, H. Rack, Mat. Sci. Eng. A 243, 206–211 (1998)
Y. Ren, X. Lin, X. Fu, H. Tan, J. Chen, W. Huang, Acta Mater. 132, 82–95 (2017)
M.J. Bermingham, S.D. McDonald, M.S. Dargusch, D.H. StJohn, Mater. Sci. Forum 654–656, 1472–1475 (2010)
P.A. Kobryn, S.L. Semiatin, J. Mater. Proc. Tech. 135, 330–339 (2003)
S. Bontha, N.W. Klingbeil, P.A. Kobryn, H.L. Fraser, J. Mater. Proc. Tech. 178, 135–142 (2006)
J. Hunt, Mater. Sci. Eng. 65, 75–83 (1984)
M. Yan, P. Yu, Sintering Techniques of Materials (IntechOpen, 2015)
P.A. Kobryn, S.L. Semiatin, JOM 53, 40–42 (2001)
T. Wang, Y.Y. Zhu, S.Q. Zhang, H.B. Tang, H.M. Wang, J. Alloy. Compd. 632, 505–513 (2015)
R.R. Boyer, G.E. Welsch, E.W. Collings (eds.), Materials Properties Handbook: Titanium Alloys (ASM International, Materials Park, 1994), p. 10
C. Leyens, M. Peters, Titanium and Titanium Alloys (Wiley, New York, 2003)
U. Diebold, Surf. Sci. Rep. 48, 53–229 (2003)
Acknowledgements
This study was supported by the Ministry of Trade, Industry and Energy (Grant No. 10077677) and supported by grants from the Fundamental Research Program (PNK5520) of the Korea Institute of Materials Science.
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Byun, Y., Lee, S., Seo, SM. et al. Effects of Cr and Fe Addition on Microstructure and Tensile Properties of Ti–6Al–4V Prepared by Direct Energy Deposition. Met. Mater. Int. 24, 1213–1220 (2018). https://doi.org/10.1007/s12540-018-0148-x
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DOI: https://doi.org/10.1007/s12540-018-0148-x