High temperature oxidation resistance and microstructure of laser-shock peened Ti-Beta-21S
TypeArticles dans des revues avec comité de lecture
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 β 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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KANJER, Armand; OPTASANU, Virgil; LAVISSE, Luc; MARCO DE LUCAS, Maria Del Carmen; DEJARDIN, Steeve; FRANÇOIS, Manuel; BERGER, Pascal D.; PEYRE, Patrice; GORNY, Cyril; MONTÉSIN, Tony (Springer New York LLC, 2017)The excellent combination of light-weight and good mechanical properties makes titanium alloys attractive for compressor section components in gas turbine engines (temperature between 250 and 600 °C). However, above 600 ...
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