期刊
CORROSION SCIENCE
卷 203, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110342
关键词
Titanium alloys; beta-21S; High temperature; Oxidation; Hardness profiles
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil (CAPES) [001]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2019/09819-9]
- BOEING RT Brazil [141654/2019-8]
- CNPq [141654/2019-8]
A correlation between the Nb/Mo contents in the beta-21S alloy and oxidation behavior at high temperatures was found. Increase in Nb content induces the formation of TiN and reduction of TiO2 scale. Additionally, microstructural changes associated with temperature increase strongly affect the oxidation behavior.
A correlation between the Nb/Mo contents in the beta-21S alloy and the oxidation behavior at high temperatures was investigated. Five alloys were oxidized pseudo-isothermally at 700, 750 and 800 degrees C under static lab air for long periods. The kinetics of mass change versus time follow a parabolic law. Oxygen dissolution in the substrate represent the main part of the mass uptake. The increase of the Nb content in the alloys induces the formation of TiN and the reduction of the TiO2 scale. The results showed also that microstructural changes associated with the increase in temperature strongly affect the oxidation behavior.
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