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High temperature oxidation resistance and microstructure of laser-shock peened Ti-Beta-21S

Abstract : Improving the high temperature (HT) resistance of titanium alloys is currently a technological challenge for extending their use in aerospace engines. Ti-Beta-21S is a metastable $\beta$ titanium alloy specifically designed for high temperature applications up to 593 °C. We report the effect of a surface treatment by laser-shock peening (LSP) on the high temperature behavior of Ti-Beta-21S in order to increase further its maximum service temperature. The oxidation kinetics at 700 °C for duration up to 3000 h showed that the LSP treatment increases the oxidation resistance of Ti-Beta-21S. The effects of the LSP treatment on the alloy microstructure, its evolution at high temperature and the diffusion of light atmospheric elements (oxygen and nitrogen) are also reported.
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Submitted on : Thursday, September 10, 2020 - 2:10:00 PM
Last modification on : Wednesday, August 24, 2022 - 3:31:23 AM
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L. Lavisse, A. Kanjer, P. Berger, V. Optasanu, Cyril Gorny, et al.. High temperature oxidation resistance and microstructure of laser-shock peened Ti-Beta-21S. Surface and Coatings Technology, Elsevier, 2020, 403, pp.126368. ⟨10.1016/j.surfcoat.2020.126368⟩. ⟨cea-02933755⟩



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