Influence of Build Orientation on Machinability of Selective Laser Melted Titanium Alloy-Ti-6Al-4V
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Influence of Build Orientation on Machinability of Selective Laser Melted Titanium Alloy-Ti-6Al-4V

Authors: Manikandakumar Shunmugavel, Ashwin Polishetty, Moshe Goldberg, Junior Nomani, Guy Littlefair


Selective laser melting (SLM), a promising additive manufacturing (AM) technology, has a huge potential in the fabrication of Ti-6Al-4V near-net shape components. However, poor surface finish of the components fabricated from this technology requires secondary machining to achieve the desired accuracy and tolerance. Therefore, a systematic understanding of the machinability of SLM fabricated Ti-6Al-4V components is paramount to improve the productivity and product quality. Considering the significance of machining in SLM fabricated Ti-6Al-4V components, this research aim is to study the influence of build orientation on machinability characteristics by performing low speed orthogonal cutting tests. In addition, the machinability of SLM fabricated Ti-6Al-4V is compared with conventionally produced wrought Ti-6Al-4V to understand the influence of SLM technology on machining. This paper is an attempt to provide evidence to the hypothesis associated that build orientation influences cutting forces, chip formation and surface integrity during orthogonal cutting of SLM Ti-6Al-4V samples. Results obtained from the low speed orthogonal cutting tests highlight the practical importance of microstructure and build orientation on machinability of SLM Ti-6Al-4V.

Keywords: Additive manufacturing, build orientation, machinability, titanium alloys (Ti-6Al-4V).

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[1] Boyer, R. R., An overview on the use of titanium in the aerospace industry. Materials Science and Engineering: A, 1996. 213(1–2): p. 103-114.
[2] Boyer, R. R., Attributes, characteristics, and applications of titanium and its alloys. JOM, 2010. 62(5): p. 21-24.
[3] Lütjering, G. and J. C. Williams, Titanium. 2007: Springer.
[4] Peters, M., et al., Titanium alloys for aerospace applications. Advanced Engineering Materials, 2003. 5(6): p. 419-427.
[5] Seagle, S. R., K. O. Yu, and S. Giangiordano, Considerations in processing titanium. Materials Science and Engineering: A, 1999. 263(2): p. 237-242.
[6] Mitchell, A., Melting, casting, and forging problems in titanium alloys. JOM, 1997. 49(6): p. 40-42.
[7] Pramanik, A., Problems and solutions in machining of titanium alloys. The International Journal of Advanced Manufacturing Technology, 2014. 70(5-8): p. 919-928.
[8] Leyens, C. and M. Peters, Titanium and Titanium Alloys: Fundamentals and Applications. 2003: Wiley.
[9] Chlebus, E., et al., Microstructure and mechanical behaviour of Ti―6Al―7Nb alloy produced by selective laser melting. Materials Characterization, 2011. 62(5): p. 488-495.
[10] Baufeld, B., E. Brandl, and O. van der Biest, Wire based additive layer manufacturing: Comparison of microstructure and mechanical properties of Ti–6Al–4V components fabricated by laser-beam deposition and shaped metal deposition. Journal of Materials Processing Technology, 2011. 211(6): p. 1146-1158.
[11] Simonelli, M., Y.Y. Tse, and C. Tuck, Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V. Materials Science and Engineering: A, 2014. 616(0): p. 1-11.
[12] Vilaro, T., C. Colin, and J. D. Bartout, As-fabricated and heat-treated microstructures of the Ti-6Al-4V alloy processed by selective laser melting. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 2011. 42(10): p. 3190-3199.
[13] Brandl, E., et al., Mechanical properties of additive manufactured titanium (Ti–6Al–4V) blocks deposited by a solid-state laser and wire. Materials & Design, 2011. 32(10): p. 4665-4675.
[14] Antonysamy, A. A., J. Meyer, and P. B. Prangnell, Effect of build geometry on the β-grain structure and texture in additive manufacture of Ti6Al4V by selective electron beam melting. Materials Characterization, 2013. 84: p. 153-168.
[15] Gibson, I., D. W. Rosen, and B. Stucker, Additive manufacturing technologies. Vol. 238. 2010: Springer.
[16] Frazier, W. E., Metal Additive Manufacturing: A Review. Journal of Materials Engineering and Performance, 2014. 23(6): p. 1917-1928.
[17] Roberts, I. A., et al., A three-dimensional finite element analysis of the temperature field during laser melting of metal powders in additive layer manufacturing. International Journal of Machine Tools and Manufacture, 2009. 49(12–13): p. 916-923.
[18] Shunmugavel, M., et al., Metallurgical and Machinability Characteristics of Wrought and Selective Laser Melted Ti-6Al-4V. Journal of Metallurgy, 2016. 2016: p. 10.
[19] Wilms, G. and R. Aghan, Anisotropy in machining of steel plates. Metals Technology, 1981. 8(1): p. 108-112.
[20] Joshi, S.S., N. Ramakrishnan, and P. Ramakrishnan, Analysis of chip breaking during orthogonal machining of Al/SiCp composites. Journal of Materials Processing Technology, 1999. 88(1–3): p. 90-96.
[21] Shunmugavel, M., et al., Tool Wear and Surface Integrity Analysis of Machined Heat Treated Selective Laser Melted Ti-6Al-4V. International Journal of Materials Forming and Machining Processes (IJMFMP), 2016. 3(2): p. 50-63.
[22] Oliaei, S.N.B. and Y. Karpat, Investigating the influence of built-up edge on forces and surface roughness in micro scale orthogonal machining of titanium alloy Ti6Al4V. Journal of Materials Processing Technology, 2016. 235: p. 28-40.