The Effect of Annealing Temperature on the High Temperature Deformation Behavior of Ti-5Al-4.2V-0.8 Mo-2Fe α/β Titanium Alloy
الموضوعات :
Maryam Morakabati
1
(
Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology
)
Peyman Ahmadian
2
(
Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran
)
Parnia Parvizian
3
(
Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran
)
الکلمات المفتاحية: α /β titanium alloy, mill annealing, hot tensile test, dynamic globularization, dynamic strain aging,
ملخص المقالة :
This paper aims to analyze the effect of annealing temperature on the microstructural changes and the following deformation behavior of Ti-5Al-4.2V-0.8Mo-2Fe α/β titanium alloy at high temperatures. For this purpose, the hot rolled specimens were mill annealed at 700, 750, and 800 °C for 1 hour. The deformation behavior of the milled annealed alloy was assessed using the hot tensile test at the temperature of 750 °C and the strain rate of 0.005 sec-1. It was found that, by increasing the mill annealing temperature, the layered microstructure changed to the equiaxed one due to static globularization. After the tensile test, the stress-strain curves showed that by decreasing the annealing temperature from 800 to 700 °C, the peak stress decreased and the elongation increased from 362% to 474%. Moreover, the apparent feature of flow curves suggested yield point phenomena as a result of dynamic strain aging. The maximum elongation of 474% was obtained after mill annealing at 700 °C a finding which is correlated with the promoted fine globular α phase with the grain size of 4.5 µm and the 44.5% content of the β phase due to the dynamic globularization.
[1] A.Ogawa, , H. Fukai, K. Minakawa, and C. Ouchi, "SP-700 Titanium Alloy Data Sheets, Beta titanium alloys in the 1990's", Proc. Annual meeting of the Minerals, Metals and Materials Society (TMS); Denver, CO (United States, Warrendale, p.513.
[2] W.Shing-Hoa, , L. Hao-Hsun, , Ch. Chih-Yuan, , Y. Jer-Ren, , and K. Chin-Hai, "The variation of β phase morphology after creep and negative creep for duplex titanium alloys", J. Mate. Sci., Vol. 44, 2009, pp.408-413.
[3] C. Leyens, M. Peters, Titanium and titanium alloys fundamental and applications, Weinheim, Wiley-VCH Verlag, Germany, 2004, p. 49.
[4] E.W. Collings, Materials properties handbook: titanium alloys, Materials Park, ASM International, Ohio, 1994 p. 68.
[6] J. Williams, and R. R. Boyer, "Opportunities and issues in the application of titanium alloys for aerospace components", Metals, Vol. 10, no. 6, 2020, pp. 705.
[7] A. Ogawa, M. Niikura, C. Ouchi, K. Minikawa, M. Yamada, "Development and applications of titanium alloy SP-700 with high formability", J. Test. Evalu., Vol. 24, No. 2, 1996, pp. 100-109.
[8] K. V., Sudhakar, and E. Wood, "Superplastic grade titanium alloy: comparative evaluation of mechanical properties, microstructure, and fracture behavior", J. Mater., Vol. 11, 2016, pp.1-7.
[9] Y. B. Lee, D. H.Shin, K-T. Park, and W. J. Nam, "Effect of annealing temperature on microstructures and mechanical properties of a 5083 Al alloy deformed at cryogenic temperature", Scripta Mater., Vol. 51, 2004, pp. 355-359.
[10] J-K. Nieh, C-T. Wu, Y-L. Chen, Ch-N. Wei, and. Sh-L. Lee, "Effect of cooling rate during solution heat treatment on the microstructure and mechanical properties of SP-700 titanium alloys", J. Mari. Sci. Tech., Vol. 24, No. 2, 2016, pp. 99-106.
[11] C. R. Brooks, Heat treatment, structure and properties of nonferrous alloys, Metals Park, ASM, Ohio, 1982 p. 115.
[12] J. K. Nieh, Sh-L. Lee, and K-S. Pan, "Effect of heat treatment and deformation on the microstructure and mechanical properties of SP-700 titanium alloy", Inter. J. Mate. Res., Vol. 106, No. 12, 2015, pp. 1224-1229.
[13] Y. L. Kao, G. C. Tu, C. A. Huang, and T. T. Liu, "A study on the hardness variation of α-and β-pure titanium with different grain sizes", Mat. Sci. Eng. A, Vol. 398, No. 1-2, 2005, pp. 93-98.
[14] A. Ogawa, H. Iizumi, "Superplasticity and post-spf properties of SP-700" Proc. The conference Titanium ’95: science and technology, vol I, Birmingham, UK, 1995, p. 588.
[15] S. F. Tan, M.J. Hie, "High Temperature Deformation of Titanium SP-700", Proc. The conference Ti-2007 Science and Technology, The Japan Institute of Metals, Japan, 2007, p. 567.
[16] J. Shen, Y. Sun, Y. Ning, H. Yu, Z. Yao and L. Hu "Superplasticity induced by the competitive DRX between BCC beta and HCP alpha in Ti-4Al-3V-2Mo-2Fe alloy", Mat. Char., Vol. 153, 2019, 304-317.
[17] E. Alabort, P. Kontis, D. Barba, K. Dragnevski and RC. Reed "On the mechanisms of superplasticity in Ti–6Al–4V",
Acta Mate., Vol. 105, 2016, 449-463.
[18] AH. Sheikhali, M. Morakabati and SM. Abbasi "Hot torsion behavior of SP-700 near beta titanium alloy in single and dual phase regions", Inter. J. Mat. Res., Vol. 109, 2018, 1136-1145.
[19] Sheikhali AH and Morakabati M " Hot working of SP-700 titanium alloy with lamellar α + β starting structure using a
processing map", Inter. J. Mat. Res., Vol. 111, 2020 (4), 297-306.
[20] P. Parvizian, M. Morakabati, and S. Sadeghpour, "Effect of hot rolling and annealing temperatures on the microstructure and mechanical properties of SP-700 alloy", Inter. J. Min., Metall. Mat., Vol. 27, 2020, pp. 374-383.
[21] Standard Test Method for Determining the Superplastic Properties of Metallic Sheet Materials," ASTM E2448, 2011.
[22] Hot working behavior of near alpha titanium alloy analyzed by mechanical testing and processing map, Maryam Morakabati, Alireza Hajari, Transactions of Nonferrous Metals Society of China, 30, 1560-1573, 2022.
[23] F. Humphreys, and M. Hatherly Recrystallization and related annealing phenomena. 2nd ed, Oxford: Elsevier, England, 2004, p. 457.
[24] C. H. Park, J. W. Won, J.-W. Park, S. Semiatin, and C. S. Lee, "Mechanisms and kinetics of static spheroidization of hot-worked Ti-6Al-2Sn-4Zr-2Mo-0.1 Si with a lamellar microstructure", Metall. Mater. Trans. A, Vol. 43, 2012, pp. 977-985.
[25] S. Semiatin, N. Stefansson, and R. Doherty, "Prediction of the kinetics of static globularization of Ti-6Al-4V", Metall. Mater. Trans. A, Vol. 36, 2005, pp. 1372-1376.
[26] P. Wanjara, M. Jahazi, H. Monajati, S. Yue, J.-P. Immarigeon, "Hot working behavior of near-α alloy IMI834", Mater. Sci. Eng. A, Vol. 396, 2005, pp. 50-60.
[27] I. Philippart, H. J. Rack, "High temperature dynamic yielding in metastable Ti–6.8Mo–4.5F–1.5Al", Mater. Sci. Eng. A, Vol. 243, 1998, pp. 196-200.
[28] Du, Z., Liu, J., Li, G., Lv, K., Yan L. , Chen, Y., "Low-temperature superplastic behavior of β titanium alloy", Mater. Sci. Eng. A, 2016, vol. 650, pp. 414-421.
[29] A.K.M. Nurul Amin, Titanium alloys- towards achieving enhanced properties for diversified applications: IntechOpen, 2012,1nd ed, p. 145.
[30] X. Zhang, L. Cao, Y. Zhao, Y. Chen, X. Tian, and J. Deng, "Superplastic behavior and deformation mechanism of Ti600 alloy", Mater. Sci. Eng. A, 2013, vol. 560, pp. 700-704.
