ESTIMATION OF OXYGEN INGRESS DEPTH IN TITANIUM ALLOYS AFTER ELEVATOR TEMPERATURE EXPOSURE
https://doi.org/10.26896/1028-6861-2018-84-3-32-35
Abstract
Titanium alloys are widely utilized for structural applications in aerospace, automotive, military, sport equipment and chemical engineering due to their high specific strength, excellent corrosion resistance and stable moderate temperature properties. In this work, samples from titanium alloys exposed to laboratory air at 625°C for 1000 h, which resulted in the formation of an oxide scale and a layer with higher oxygen concentration. The depth of oxygen-enriched layer after annealing was estimated by four methods: metallographic examination, fractography, hardness testing and XRD analysis. This paper summarizes an effort to estimate depth of oxygen-enriched layer in titanium alloys after elevated temperature exposure.
About the Authors
M. S. Kalienko
VSMPO-AVISMA; Ural Federal University.
Russian Federation
Verkhnaya Salda; Yekaterinburg.
Russian Federation
Verkhnaya Salda; Yekaterinburg.
A. V. Volkov
VSMPO-AVISMA.
Russian Federation
Verkhnaya Salda.
Russian Federation
Verkhnaya Salda.
A. V. Zhelnina
VSMPO-AVISMA; Ural Federal University.
Russian Federation
Verkhnaya Salda; Yekaterinburg.
Russian Federation
Verkhnaya Salda; Yekaterinburg.
References
1. Shenoy R., Unnam J., Clark R. Oxidation and embrittlement of Ti6242 alloy / Oxidation of Metals. 1986. Vol. 26. P. 105 – 123.
2. Pilchak A., Porter W., John R. Room temperature fracture processes of a near-α titanium alloy following elevated temperature exposure / J. Mater Sci. 2012. N 47. P. 7235 – 7253.
3. Geary B., Bolam V., Jenkins S., Davies D. High temperature titanium sheet for helicopter exhaust applications / 8th World Conf. of Titanium / Titanium’1995: Science and Technology. Proc. — Birmingham, 1995. P. 1638 – 1645.
4. Bania P. Next generation titanium alloys for elevated temperature service / ISIJ International. 1991. Vol. 31. N 8. P. 840 – 847.
5. Sansoz F. Almesallmy M., Ghonem H. Ductility exhaustion mechanisms in thermally exposed thin sheets of a near-titanium alloy / Met. Mat. Trans. A. 2004. Vol. 35A. P. 3113 – 3127.
6. McReynolds K., Tamirisakandala S. A Study on alpha-case depth in Ti-6Al-2Sn-4Zr-2Mo / Met. Mat. Trans. A. 2011. Vol. 42. P. 1732 – 1736.
7. Gaddam R., Sefer B., Pederson R., Antti M-L. Oxidation and alpha-case formation in Ti-6Al-2Sn-4Zr-2Mo alloy / Materials Characterization. 2015. N 99. P. 166 – 174.
8. Brockman R., Pilchak A., Porter W., John R. Estimation of grain boundary diffusivity in near-α titanium polycrystals / Scripta Materialia. 2011. N 65. P. 513 – 515.
Review
For citations:
Kalienko M.S., Volkov A.V., Zhelnina A.V. ESTIMATION OF OXYGEN INGRESS DEPTH IN TITANIUM ALLOYS AFTER ELEVATOR TEMPERATURE EXPOSURE. Industrial laboratory. Diagnostics of materials. 2018;84(3):32-35. (In Russ.) https://doi.org/10.26896/1028-6861-2018-84-3-32-35
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