• Omer Eyercioglu Department of Mechanical Engineering, Gaziantep University, Gaziantep, Turkey
  • Yusuf Atalay Department of Mechanical Engineering, Gaziantep University, Gaziantep, Turkey
  • Mehmet Aladag Department of Mechanical Engineering, Gaziantep University, Gaziantep, Turkey




TIG Welding, Wire Arc Additive Manufacturing, Overhang, 3d Printing


Wire Arc Additive Manufacturing (WAAM) is a relatively new manufacturing method. It is a novel technique to build net-shaped or near-net-shaped metal components in a layer-by-layer manner via applying metal wire and selection of a heat source such as laser beam, electron beam, or electric arc. WAAM process is preferable as an alternative to traditional manufacturing methods especially for complex featured and large scale solid parts manufacturing and it is particularly used for aerospace structural components, manufacturing and repairing of dies/molds. TIG welding-based WAAM method is implemented by depositing continuous wire melted via heat. In this study, the overhang (self-supporting) angle in TIG welding-based wire arc additive manufacturing process is investigated. The overhang angles are the angles at which a 3D printer can build tapered (overhang) surfaces without the need to supporting material below the printing layer. The material, bead height, TIG weld parameters and the environment temperature (cooling rate of printed layer) are the parameters which affect the overhang angle. The results show that the maximum overhang angle is also dependent on the temperature of the previous layer. For the selected set of process parameters, the maximum overhang angle is found as 28o, if the temperature of the previous layer is cooled to 150oC before the subsequent layer is deposited.


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Yilmaz, O., Almusawi, A. R. J., Ugla, A. A., and Keskin, O. O. "Design, Construction, and Controlling of A Shaped Metal Deposition Machine Using Arc Metal-Wire System", Issue June 2015, 2016.

Antonysamy, A. A. Microstructure, Texture and Mechanical Property Evolution during Additive Manufacturing of Ti6Al4V Alloy for Aerospace Applications, 2012.

Buckner, M. A. and Love, L. J. In Automating and accelerating the additive manufacturing design process with multi-objective constrained evolutionary optimization and HPC/Cloud computing, IEEE: 2012. DOI: https://doi.org/10.1109/FIIW.2012.6378352

Wohlers, T. "Rapid Prototyping 7 Tooling State of the Industry", Wohlers Report, 2002.

Mahamood, R., Akinlabi, E., Shukla, M., and Pityana, S. "Laser metal deposition of Ti6Al4V: A study on the effect of laser power on microstructure and microhardness", 2013.

Syed, W. U. H., Pinkerton, A. J., and Li, L. "Combining wire and coaxial powder feeding in laser direct metal deposition for rapid prototyping", Applied Surface Science, Vol. 252, Issue 13, Pages 4803–4808, 2006. DOI: https://doi.org/10.1016/j.apsusc.2005.08.118

Syed, W. U. H. , Pinkerton, A. J. , and Li, L. "Simultaneous wire- and powder-feed direct metal deposition: An investigation of the process characteristics and comparison with single-feed methods", Journal of Laser Applications, Vol. 18, Issue 1, Pages 65–72, 2006. DOI: https://doi.org/10.2351/1.2164485

Brandl, E., Leyens, C., and Palm, F. "Mechanical Properties of Additive Manufactured Ti-6Al-4V Using Wire and Powder Based Processes", IOP Conference Series: Materials Science and Engineering, Vol. 26, Pages 012004, 2011. DOI: https://doi.org/10.1088/1757-899X/26/1/012004

Rapolac Project. http://www.rapolac.eu

Bonaccorso, F., Bruno, C., Cantelli, L., Longo, D., and Muscato, G. "Control of a shaped metal deposition process", Physics Conference (PHYSCON), Pages 1–5, 2009.

Bonaccorso, F., Cantelli, L., and Muscato, G. "An Arc Welding Robot Control for a Shaped Metal Deposition Plant: Modular Software Interface and Sensors", IEEE Transactions on Industrial Electronics, Vol. 58, Issue 8, Pages 3126–3132, 2011. DOI: https://doi.org/10.1109/TIE.2011.2114311

Muscato, G., Spampinato, G., and Cantelli, L. In A closed loop welding controller for a rapid manufacturing process, IEEE: 2008. DOI: https://doi.org/10.1109/ETFA.2008.4638529

Merz, R., Ramaswami, Terk, K., and Weiss, M. "Shape Deposition Manufacturing", The Solid Freeform Fabrication Symposium, Pages 1–7, 1994.

Skiba, T., Baufeld, B., and Biest, O. van der "Microstructure and Mechanical Properties of Stainless-Steel Component Manufactured by Shaped Metal Deposition", ISIJ International, Vol. 49, Issue 10, Pages 1588–1591, 2009. DOI: https://doi.org/10.2355/isijinternational.49.1588

Hoffarth, M., Gerzen, N., and Pedersen, C. "ALM Overhang Constraint in Topology Optimization for Industrial Applications", 12th World Congress on Structural and Multidisciplinary Optimisation, Issue June, Pages 1–11, 2017.

Roschli, A. , Gaul, K. T. , Boulger, A. M. , Post, B. K. , Chesser, P. C. , Love, L. J. , Blue, F. , and Borish, M. "Designing for Big Area Additive Manufacturing", Additive Manufacturing, Vol. 25, Pages 275–285, 2019. DOI: https://doi.org/10.1016/j.addma.2018.11.006

X. Qian, "Undercut and overhang angle control in topology optimization: A density gradient based integral approach", International Journal for Numerical Methods in. Engineering, 1097-1207, 2017.

K. Svanberg, "The method of moving asymptotes - a new method for structural optimization", International Journal for Numerical Methods in Engineering, 24(2), 359-373, 1987. DOI: https://doi.org/10.1002/nme.1620240207

A.T. Gaynor, "Topology optimization algorithms for additive manufacturing", Doctoral dissertation, The Johns Hopkins University, Baltimore, US-MD, 57-84, 2015.

M. Langelaar, "Topology optimization of 3D self-supporting structures for additive manufacturing", Additive Manufacturing, 12 (A), 60-70, 2016. DOI: https://doi.org/10.1016/j.addma.2016.06.010

M. Langelaar, "An additive manufacturing filter for topology optimization of print-ready designs", Structural and Multidisciplinary Optimization, 55 (3), 871-883, 2017. DOI: https://doi.org/10.1007/s00158-016-1522-2




How to Cite

Eyercioglu, O., Atalay, Y., & Aladag, M. (2019). EVALUATION OF OVERHANG ANGLE IN TIG WELDING-BASED WIRE ARC ADDITIVE MANUFACTURING PROCESS. International Journal of Research -GRANTHAALAYAH, 7(10), 247–254. https://doi.org/10.29121/granthaalayah.v7.i10.2019.393