Abstract
TiAl-based alloys have not only excellent high-temperature strength, high-temperature creep and oxidation resistance, but also low density and high strength-to-weight ratio, having extensive application prospect in the aerospace and automobile industry. In this paper, the single-phase γ-TiAl-based alloys were studied. In order to refine the coarse microstructures of single-phase γ-TiAl-based alloys, three different kinds of γ-TiAl-based alloys, including Ti–54Al (at.%), Ti–52Al (at.%), and Ti–50Al (at.%), were melted and homogenized at 1150 °C for 36 h. The effect of composition on grain refinement and grain boundary distribution of single-phase γ-TiAl-based alloys were investigated. The results showed that the grain size of the alloys was refined with the increase of aluminum content after homogenizing treatment. In addition, the grain boundary character distribution was non-uniform. Inside the columnar crystals, there were a large number of coherent Σ3 grain boundaries. The derived capacity of Σ3 grain boundaries was poor, and general high-angle grain boundaries were connected to each other.
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References
G. Welsch, R. Boyer, E.W. Collings, Materials Properties Handbook: Titanium Alloys (ASM international, 1993)
F. Appel, J.D.H. Paul, M. Oehring, Gamma Titanium Aluminide Alloys: Science and Technology (Wiley, 2011)
J.C. Schuster, M. Palm, Reassessment of the binary aluminum-titanium phase diagram. J. Phase Equilib. Diffus. 27(3), 255–277 (2006)
T. Watanabe, An approach to grain-boundary design for strong and ductile polycrystals. Res. Mech. 11(1), 47–84 (1984)
G. Palumbo, E.M. Lehockey, P. Lin, Applications for grain boundary engineered materials. JOM 50(2), 40–43 (1998)
C. Cheung, U. Erb, G. Palumbo, Application of grain boundary engineering concepts to alleviate intergranular cracking in alloys 600 and 690. Mater. Sci. Eng. A 185(1–2), 39–43 (1994)
E.M. Lehockey, G. Palumbo, P. Lin, Improving the weldability and service performance of nickel-and iron-based superalloys by grain boundary engineering. Metall. Mater. Trans. A 29(12), 3069–3079 (1998)
G. Palumbo, Thermomechanical Processing of Metallic Materials. U.S. Patent No. 5,702,543 (1997)
G. Palumbo, Metal Alloys Having Improved Resistance to Intergranular Stress Corrosion Cracking. U.S. Patent No. 5,817,193 (1998)
D. Shechtman, M.J. Blackburn, H.A. Lipsitt, The plastic deformation of TiAl. Metall. Trans. 5(6), 1373–1381 (1974)
R.G. Baligidad, U. Prakash, V.R. Rao et al., Effect of addition of β-phase stabilizing elements (Nb, Mo and V) on plastic behaviour of Ti3Al single crystals with the D019 structure. Metall. Trans. A 6(11), 1991 (1975)
G. Hug, A. Loiseau, A. Lasalmonie, Nature and dissociation of the dislocations in TiAl deformed at room temperature. Philos. Mag. A 54(1), 47–65 (1986)
V. Randle, Mechanism of twinning-induced grain boundary engineering in low stacking-fault energy materials. Acta Mater. 47(15), 4187–4196 (1999)
V. Randle, Twinning-related grain boundary engineering. Acta Mater. 52(14), 4067–4081 (2004)
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Xuanyuan, Y., Long, Y., Yan, Y., Yang, S. (2019). The Effect of Aluminum Content on the Microstructures of Single-Phase γ-TiAl-Based Alloy. In: Han, Y. (eds) Physics and Engineering of Metallic Materials. CMC 2018. Springer Proceedings in Physics, vol 217. Springer, Singapore. https://doi.org/10.1007/978-981-13-5944-6_22
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DOI: https://doi.org/10.1007/978-981-13-5944-6_22
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