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The paper presents testing results of cyclic oxidation of Ti-46A1-7Nb based intermetallic alloy taking into account the effect of temperature, surface roughness and the cooling rate of temperature. Oxidation was carried out in air at the temperature between 875°C and 975°C. It was determined that in case of conventional preparation of the surface by grinding to low Ra value (in the research Ra~0,06žm), distinct scale chipping was present at the temperature of 950°C and above. The rise of surface roughness to R,:~6žm results in mass increase in case of oxidation in the temperature of 900°C, whereas it definitely reduces scale chipping in higher temperatures (925°C, 975°C). A slightly higher mass increase of the oxidised alloy including rise of the cooling rate were also determined.
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Tom
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57--62
Opis fizyczny
Bibliogr. 12 poz., rys.
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autor
autor
autor
- Technical University of Opole, Faculty of Mechanical Engineering, Institute of Materials Science, Opole, Poland
Bibliografia
- 1. ASM Handbook, vol.3. Alloy Phase Diagrams, Metal treatment, Structure and Joining Collection. Section: Binary Alloy Phase Diagrams, Standard Content, 1998.
- 2. Clemens H., Kestler H.: Advanced Engineering Materials, 2. No 9, 2000, pp. 551570.
- 3. Kim Y.W., Dimduk M.D.: Journal of Metals 43, 1991, pp. 40-47.
- 4. Kim Y.W., Dimduk M.D.: Journal of Metals 41, 1989, pp. 24-30.
- 5. Yamaguchi M., Inui H.: in Structural Intermetallics 1993, pp. 127-142.
- 6. Lowell C.E., Deadmore D.L.: Oxid. Metals, 14, 1980, pp. 325-336.
- 7. Yoshihara M., Kim Y.W.: in Gamma Titanium Aluminides 2003, pp. 559-566.
- 8. Rhines F.N., Wolf J.S: Metal Trans. 1, 1970, pp. 1701-1708.
- 9. Król S.: Utlenianie stopów Ti-A1 na osnowie faz międzymetalicznych, Oficyna Wydawnicza Politechniki Opolskiej, z. 188, Opole 2006.
- 10. Clemens H., Appel F., Bartels R., Baur H., Gerling H., Guther V., Kestler H.: in Ti-2003 Science and Technology 2004, vol. IV, pp. 2123-2132.
- 11. Smialek J.L., Nesbitt J.A., Barrett C.A., Lowell C.E.: Raport NASA, ITM-1999-209769,2000.
- 12. Król S., Zemćik L.: Materiały Konf: "Tytan i jego stopy", 2005, pp. 160-164.
Typ dokumentu
Bibliografia
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bwmeta1.element.baztech-article-BPG4-0028-0044