Microstructure evolution of CP titanium during high temperature deformation

• Autorzy: Tan M. J. , Zhu X. J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: To investigate the superplasticity of commercially pure titanium alloy and microstructure evolution of the alloy during high temperature deformation. Design/methodology/approach: Uniaxial tensile tests were carried out at 600, 750 and 800°C with an initial strain rate from 10 ^-1 s ^-1 10 ^-4 s ^-1. EBSD technology was used to evaluate the microstructure of the commercially pure titanium alloy deformed at high temperature. Findings: It is found that this titanium alloy does not show good superplasticity at 600-800°C due to the rapid grain growth. Studies also show that the dynamic recrystallization took place at high temperatures. The optimum dynamic recrystallization conditions were found to be at 600°C with an initial strain rate of 0.001/s, attaining the highest volume fraction of fine grains whose average grain size is ≈ 9.7 µm at strain of 80%. This process not only decreases the average grain size of the alloy but also increase the misorientation angle of the grain boundary. Practical implications: The investigations of microstructure of the commercially pure titanium alloy as well as related phenomena during high temperature deformation are important for achieving desired mechanical behavior of the material. Originality/value: The dynamic recrystallization phenomenon of commercially pure titanium alloy as well as related mechanism is investigated.

Słowa kluczowe

EN

superplastic materials; titanium; dynamic recrystallization; Electron Backscattered Diffraction (EBSD)

PL

materiały nadplastyczne; tytan; rekrystalizacja dynamiczna; dyfrakcja elektronów wstecznie rozproszonych

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2007
• Tom: Vol. 28, nr 1
• Strony: 5--11
• Opis fizyczny: Bibliogr. 21 poz., il., wykr.

Twórcy

autor

Tan M. J.

autor

Zhu X. J.

• School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore,

Bibliografia

• [1] M. J. Tan, X. J. Zhu, Dynamic recrystallisation in commercially pure titanium, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 183-186.
• [2] F. J. Campideli, H. E. P. Sobrinho, L. Correr, D. Goes, M. Fernando, Stress-relieving and porcelain firing cycle influence on marginal fit of commercially pure titanium and titanium-aluminum-vanadium copings, Dental Materials 19 (2003) 686-691.
• [3] S. Kundu, M. Ghosh and S. Chatterjee, Diffusion bonding of commercially pure titanium and 17-4 precipitation hardening stainless steel, Materials Science and Engineering A 428 (2006) 18-23.
• [4] C. R. F. Azevedo, A. P. D. Santos, Environmental effects during fatigue testing: fractographic observation of commercially pure titanium plate for cranio-facial fixation, Engineering Failure Analysis, 10 (2003) 431-442.
• [5] S. Kundu, M. Ghosh, A. Laik, K. Bhanumurthy, G. B. Kale, S. Chatterjee, Diffusion bonding of commercially pure titanium to 304 stainless steel using copper interlayer, Materials Science and Engineering A 407 (2005) 154-161.
• [6] G. Mabilleau, S. Bourdon, M. L. Joly-Guillou, R. Filmon, M. F. Baslé, D. Chappard, Influence of fluoride, hydrogen peroxide and lactic acid on the corrosion resistance of commercially pure titanium, Acta Biomaterialia 2 (2006) 121-129.
• [7] J. M. Liu, S. S. Chou, Study on the microstructure and formability of commercially pure titanium in two temperature deep drawing, Journal of Materials Processing Technology 95 (1999) 65-70.
• [8] C. Y. Gao, P. Lours, G. Bernhart, Thermomechanical stress analysis of superplastic forming tools, Journal of Materials Processing Technology 169 (2005) 281-289.
• [9] M. J. Tan, X. J. Zhu, Dynamic recrystallization in commercially pure titanium, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 183-186.
• [10] K. F. Zhang, G. F. Wang, D. Z. Wu, Z. R. Wang, Research on the controlling of the thickness distribution in superplastic forming, Journal of Materials Processing Technology 151 (2004) 54-57.
• [11] B. P. Kashyap and M. C. Chaturvedi, The effect of prior annealing on high temperature flow properties of and microstructural evolution in SPF grade IN718 superalloy, Materials Science and Engineering A 445-446 (2007) 364-373.
• [12] A. H. Chokshi, T. G. Langdon, The influence of rolling direction on the mechanical behavior and formation of cavity stringers in the superplastic Zn-22% Al alloy, Acta Metallurgy 37 (1989) 715-723.
• [13] S. N. Patankar, Y. T. Kwang, T. M. Jen, Alpha casing and superplastic behavior of Ti-6Al-4V, Journal of Materials Processing Technology 112 (2001) 24-28.
• [14] Y. M. Hwang, H. S. Lay, Study on superplastic blowforming in a rectangular closed-die, Journal of Materials Processing Technology 140 (2003) 426-431.
• [15] X. J. Zhu, M. J. Tan, W. Zhou, Enhanced superplasticity in commercially pure titanium alloy, Scripta Materialia 52 (2005) 651-655.
• [16] P. S. Bate, N. Ridley, B. Zhang, S. Dover, Optimisation of the superplastic forming of aluminium alloys, Journal of Materials Processing Technology 177 (2006) 91-94.
• [17] L. Carrino, G. Giuliano, N. Ucciardello, Analysis of void growth in superplastic materials, Journal of Materials Processing Technology 155 (2004) 1273-1279.
• [18] Y. Xun, M. J. Tan, K. M. Liew, EBSD characterization of cavitation during superplastic deformation of Al-Li alloy, Journal of Materials Processing Technology 162 (2005) 429-434.
• [19] T. G. Nieh, J. Wadsworth, O. D. Sherby, Superplasticity in Metals and Ceramics, Cambridge, Cambridge University Press, 1996.
• [20] K. Tsuzaki, X. Huang, T. Maki, Mechanism of dynamic continuous recrystallization during superplastic deformation in a microduplex stainless steel, Acta Materialia 44 (1996) 4491-4499.
• [21] Y. Xun, M. J. Tan, T. G. Nieh, Grain boundary characterisatio n in superplastic deformation of Al-Li alloy using electron backscatter diffraction, Materials Science and Technology 20 (2004) 173-180.