Abstract
Results of investigations of the initial structure of large-size Ti49.4Ni50.6 samples subjected to severe plastic deformation by torsion under a high pressure (HPT) are reported. The study was performed using transmission and scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, and measurements of mechanical properties. Under an applied pressure of 6 GPa, the alloy was found to undergo a martensitic B2 → B19′ transformation. Even after HPT using a single revolution of anvils, the granular structure of titanium nickelide is refined so that there is formed a nanocrystalline state of B2 austenite (i.e., the reverse martensitic B19′ → B2 transformation occurs) and amorphization of the alloy begins. The HPT with a high number of revolutions leads to the almost complete amorphization of the alloy, which is explained by a high degree of shear deformation. In this case, all nanocrystalline inclusions in the amorphous matrix have an ordered B2 structure.
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References
V. N. Khachin, V. G. Pushchin, and V. V. Kondrat’ev, Titanium Nickelide: Structure and Properties (Nauka, Moscow, 1992) [in Russian].
V. G. Pushin, V. V. Kondrat’ev, and V. N. Khachin, Pretransition Effects and Martensite Transformations (Ural. Otd. Ross. Akad. Nauk, Ekaterinburg, 1998) [in Russian].
Shape Memory Materials, Ed. by K. Otsuka and C. M. Wayman (Cambridge University Press, Cambridge, 1999).
Shape-Memory Titanium Nickelide Alloys. Part 1: Structure, Phase Transformations and Properties, Ed. by V. G. Pushin (Ural. Otd. Ross. Akad. Nauk, Ekaterinburg, 2006) [in Russian].
V. G. Pushin, “Alloys with a Thermomechanical Memory: Structure, Properties, and Application,” Phys. Met. Metallography 90(Suppl. 1), 68–95 (2000).
S. D. Prokoshkin, V. G. Pushin, E. P. Ryklina, and I. Yu. Khmelevskaya, “Application of Titanium Nickelide Based Alloys in Medicine,” Phys. Met. Metallography 97(Suppl. 1), 56–96 (2004).
V. G. Pushin, V. Brailovski, I. Yu. Khmelevskaya, et al., “Foundation of Heat and Thermomechanical Treatments and Their Effect on the Structure and Properties of Titanium Nickelide-Based Alloys,” Phys. Met. Metallography 97(Suppl. 1), 3–55 (2004).
R. Z. Valiev and I. V. Aleksandrov, Bulk Nanostructured Metallic Materials (Akademkniga, Moscow, 2007) [in Russian].
V. G. Pushin, V. V. Stolyarov, R. Z. Valiev, et al., “Features of Structure and Phase Transformations in Shape Memory TiNi-Based Alloys After Severe Plastic Deformation,” Ann. Chim. Sci. Mat. 27(3), 77–88 (2002).
V. G. Pushin, V. V. Stolyarov, R. Z. Valiev, et al., “Development of Methods of Severe Plastic Deformation for the Production of High-Strength Alloys Based on Titanium Nickelide with a Shape Memory Effect,” Phys. Met. Metallogr. 94(Suppl. 1), 54–68 (2002).
V. G. Pushin, R. Z. Valiev, and L. I. Yurchenko, “Processing of Nanostructured TiNi-Shape Memory Alloys: Methods, Structures, Properties, Application,” J. Phys. IV 112, 659–662 (2003).
V. G. Pushin and R. Z. Valiev, “The Nanostructured TiNi Shape Memory Alloys: New Properties and Applications,” Solid State Phenom. 94, 12–21 (2003).
A. V. Sergueeva, C. Song, R. Z. Valiev, and A. K. Mukherjee, “Structure and Properties of Amorphous and Nanocrystalline TiNi Prepared by Severe Plastic Deformation and Annealing,” Mater. Sci. Eng., A A339, 159–165 (2003).
R. Z. Valiev, V. G. Pushin, D. V. Gunderov, and A. G. Popov, “The Use of Severe Deformations for Preparing Bulk Nanocrystalline Materials from Amorphous Alloys,” Dokl. Akad. Nauk 398(1), 54–56 (2004) [Dokl. Phys. 398 (1–3), 519–521 (2004)].
J. Y. Huang, Y. T. Zhu, X. Z. Liao, and R. Z. Valiev, “Amorphization of TiNi Induced by High-Pressure Torsion,” Philos. Mag. Lett. 84(3), 183–190 (2004).
R. Z. Valiev, D. V. Gunderov, and V. G. Pushin, “Metastable Nanostructured SPD TiNi Alloys with Unique Properties,” J. Metastable Nanocryst. Mater. 24–25, 7–12 (2005).
S. D. Prokoshkin, I. Yu. Khmelevskaya, S. V. Dobatkin, et al., “Structure Evolution upon Severe Plastic Deformation of TiNi-Based Shape-Memory Alloys,” Phys. Met. Metalloved. 97(6), 84–90 (2004) [Phys. Met. Metallography 97 (6), 619–625 (2004)].
V. G. Pushin, R. Z. Valiev, Y. T. Zhu, et al., “Effect of Equal Channel Angular Pressing and Repeated Rolling on Structure, Phase Transformations and Properties of TiNi Shape Memory Alloys,” Mater. Sci. Forum 503–504, 539–544 (2006).
V. G. Pushin, A. V. Korolev, N. I. Kourov, et al., “SPDInduced Nanocrystallization of Shape Memory Ni2MnGa-Based and NiTi-Based Alloys Quenched from Liquid State,” Mater. Sci. Forum 503–504, 545–550 (2006).
A. V. Sharafutdinov, V. A. Shundalov, and V. V. Latysh, “Application and Development of High-Pressure Torsion Scheme for the Formation of Nanostructures in Metals and Alloys,” Fiz. Tech. Vys. Davl. 12(4), 76–80 (2002).
E. V. Tat’yanin, N. F. Borovikov, V. G. Kurdyumov, and V. L. Indenbom, “Amorpous Shear Bands in Deformed TiNi Alloy,” Fiz. Tverd. Tela 39(7) (1997).
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Original Russian Text © D.V. Gunderov, N.N. Kuranova, A.V. Luk’yanov, A.N. Uksusnikov, E.A. Prokof’ev, L.I. Yurchenko, R.Z. Valiev, V.G. Pushin, 2009, published in Fizika Metallov i Metallovedenie, 2009, Vol. 108, No. 2, pp. 139–146.
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Gunderov, D.V., Kuranova, N.N., Luk’yanov, A.V. et al. Application of severe plastic deformation by torsion to form amorphous and nanocrystalline states in large-size TiNi alloy sample. Phys. Metals Metallogr. 108, 131–138 (2009). https://doi.org/10.1134/S0031918X09080055
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DOI: https://doi.org/10.1134/S0031918X09080055