Commenced in January 2007
Paper Count: 32586
The Effects of Electromagnetic Stirring on Microstructure and Properties of γ-TiAl Based Alloys Fabricated by Selective Laser Melting Technique
Abstract:The γ-TiAl based Ti-Al-Mn-Nb alloys were fabricated by selective laser melting (SLM) on the TC4 substrate. The microstructures of the alloys were investigated in detail. The results reveal that the alloy without electromagnetic stirring (EMS) consists of γ-TiAl phase with tetragonal structure and α2-Ti3Al phase with hcp structure, while the alloy with applied EMS consists of γ-TiAl, α2-Ti3Al and α-Ti with hcp structure, and the morphological structure of the alloy without EMS which exhibits near lamellar structure and the alloy with EMS shows duplex structure, the alloy without EMS shows some microcracks and pores while they are not observed in the alloy without EMS. The microhardness and wear resistance values decrease with applied EMS.
Digital Object Identifier (DOI): doi.org/10.6084/m9.figshare.12489632Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 693
 D. Srivastava, Microstructural characterization of the γ-TiAl alloy samples fabricated by direct laser fabrication rapid prototype technique. Bulletin of Materials Science, 2002, p. 619-633.
 D. Srivastava,I. Chang, and M. Loretto The effect of process parameters and heat treatment on the microstructure of direct laser fabricated TiAl alloy samples. Intermetallics, 2001, p. 1003-1013.
 D. Srivastava, et al. The influence of thermal processing route on the microstructure of some TiAl-based alloys. Intermetallics, 1999, p. 1107-1112.
 H.P. Qu, et al. The effects of heat treatment on the microstructure and mechanical property of laser melting deposition γ-TiAl intermetallic alloys. Materials and Design, 2010, p. 2201-2210.
 A. Menand, H. Zapolsky-Tatarenko,and A. Nrac-Partaix. Atom-probe investigations of TiAl alloys. Materials Science and Engineering A, 1998, p. 55-64.
 S.Z. Zhang, et al. Microstructure and tensile properties of hot fogred high Nb containing TiAl based alloy with initial near lamellar microstructure. Materials Science and Engineering A, 2015, p. 16-21.
 C. Kenel, et al. MSelective laser melting of an oxide dispersion strengthened (ODS) γ-TiAl alloy towards production of complex structures. Materials and Design, 2017.
 X.P. Li, J.V. Humbeeck, and J.P. Kruth. Selective laser melting of weak-textured commercially pure titanium with high strength and ductility: A study from laser power perspective. Materials and Design, 2017, p. 352-358.
 W. Li, et al. SEffect of laser scanning speed on a Ti-45Al-2Cr-5Nb alloy processed by selective laser melting: Microstructure, phase and mechanical properties. Journal of Alloys and Compounds, 2016, p. 626-636.
 G. Yang, et al. Microstructures of as-Fabricated and Post Heat Treated Ti-47Al-2Nb-2Cr Alloy Produced by Selective Electron Beam Melting(SEBM). Rare Metal Materials and Engineering, 2016.
 M. Thomas, et al. The prospects for additive manufacturing of bulk TiAl alloy. High Temperature Technology, 2016, p. 571-577.
 J. Gussone, et al. Microstructure of γ-titanium aluminide processed by selective laser melting at elevated temperatures. Intermetallics, 2015, p. 133-140.
 L. Lober, et al. Selective laser melting of a beta-solidifying TNM-B1 titanium aluminide alloy. Journal of Materials Processing Technology, 2014, p. 1852-1860.
 Y.Z. Zhao, et al. Microstructural evolution of hot-forged high Nb containing TiAl alloy during high temperature tension. Materials Science and Engineering ,2016,p.116-121.
 E.T. Zhao, et al. Microstructural control and mechanical properties of a β-solidified γ-TiAl alloy Ti-46Al-2Nb-1.5V-1Mo-Y. Materials Science and sengineering:A, 2017, p. 1-6.
 H. Jabbar, et al. Microstructures and deformation mechanisms of a G4 TiAl alloy produced by spark plasma sintering. Acta Materialia, 2011, p. 7574-7585.
 F. Appel, J.D.H. Paul, and M. Oehring. Gamma Titanium Aluminide Alloys (Science and Technology) Applications, Component Assessment, and Outlook. Wiley-VCH Verlag GmbH and Co. KGaA, 2010.
 M.F. Zaeh, and G. Branner. Investigations on residual stresses and deformations in selective laser melting. Production Engineering.2010, P. 35-45.
 B. Vrancken, et al. Residual stress via the contour method in compact tension specimens produced via selective laser melting. Scripta Materialia. 87, p. 29-32.
 B. L. Van Belle, G. Vansteenkiste, and J.C. Boyer. Investigation of residual stresses induced during the selective laser melting process. Trans Tech Publ. 2013.
 P. Mercelis and J.P. Kruth. Residual stresses in selective laser sintering and selective laser melting. Rapid prototyping journal. 2006, P. 254-265.
 J. H Matthew,et al. Effect of electromagnetic stirring on grain refinement of Al-(4.5%)Cu alloy. Thesis submitted to the University of Alabama. 2013.