Air Oxidation Behaviour of a Ti-6Al-7Nb Alloy

Mehtap Deniz Unlu; Onur Meydanoglu; H. Çimenoğlu

doi:10.4028/www.scientific.net/DDF.297-301.1389

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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vols. 297-301Air Oxidation Behaviour of a Ti-6Al-7Nb Alloy

Air Oxidation Behaviour of a Ti-6Al-7Nb Alloy

Abstract:

Air oxidation behavior of a Ti6Al7Nb alloy was examined over the temperature range of 873 –1173 K for different time intervals ranging in between 12 and 72 h. The rate of oxidation evaluated according to the weight gain measurements, fitted parabolic kinetics by yielding oxidation activation energy of 226 kJ/mol. Rutile and anatase modifications of TiO2 formed on the surface as the result of air oxidation. Oxidation temperatures higher than 923 K encouraged rutile formation rather than anatase. As temperature of oxidation was increased, the thickness of the oxide layer increased. Thicker oxide layer provided higher surface hardness and better protection against a corrosive media (5 M HCl solution) was provided.

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Periodical:

Defect and Diffusion Forum (Volumes 297-301)

Pages:

1389-1394

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.297-301.1389

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Online since:

April 2010

Authors:

Mehtap Deniz Unlu, Onur Meydanoglu, H. Çimenoğlu

Keywords:

Corrosion, Hardness, Oxidation, Ti6Al7Nb, Titanium

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References

[1] M. Peters et al. in : Titanium and Titanium Alloys Fundamentals and Applications Structure and Properties of Titanium and Titanium Alloys, edited by C. Leyens, M. Peters, Structure and Properties of Titanium and Titanium Alloys, Chapter 1, Willey-VCH (2003).

DOI: 10.1002/3527602119.ch1

Google Scholar

[2] P.A. Dearnley, K.L. Dahm and H. Cimenoglu: Wear Vol. 256 (2004), p.469.

Google Scholar

[3] H. Guleryuz and H. Cimenoglu: Biomaterials Vol. 25 (2004), p.3325.

Google Scholar

[4] H. Guleryuz, H. Cimenoglu: Surf. Coat. Technol. Vol. 192 (2005), p.164.

Google Scholar

[5] F.M. Guclu, H. Cimenoglu, E.S. Kayali: Mater. Sci. Eng. C Vol. 26 (2006), p.1367.

Google Scholar

[6] H. Guleryuz, H. Cimenoglu: J. Alloys Comps. Vol. 472 (2009), p.241.

Google Scholar

[7] M.D. Unlu, Surface Treatment of Ti6Al7�b Alloy by Thermal Oxidation, MS Thesis, Istanbul Technical University Institute of Science and Technology, Istanbul, (June 2009).

Google Scholar

[8] M.F. Ashby and D.R.H. Jones: Engineering Materials 1 An Introduction to Their Properties and Applications (Butterworth Heinemann, England 1996).

Google Scholar