CYCLIC OXIDATION OFTi-48%Al-2%Cr-2%Nb-(0~1%)WALLOYS BETWEEN 800 AND 1000°C IN AIR

Sang-Hwan Bak, Dong Yi Seo, Seon-Jin Kim, Jae Chun Lee and Dong Bok Lee ()
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Sang-Hwan Bak: School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Korea
Dong Yi Seo: Structures and Materials Performance Lab., Institute for Aerospace Research, National Research Council, Ottawa, Ontario KIA0R6, Canada
Seon-Jin Kim: Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
Jae Chun Lee: Department of Materials Science and Engineering, Myongji University, Yongin 449-728, Korea
Dong Bok Lee: School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Korea

Surface Review and Letters (SRL), 2010, vol. 17, issue 02, 141-146

Abstract: Ti-48%Al-2%Cr-2%Nb-(0, 0.5, 1)at.%W alloys were synthesized via the powder metallurgical route, and cyclically oxidized at 800, 900, or 1000°C in air for up to 100 h in order to find the effects ofWon their oxidation characteristics. At 800°C, they oxidized relatively slowly, and the scales were thin and adherent. At 900°C, the scales began to spall locally. At 1000°C, they spalled repetitively during oxidation.Cr,Nb, andWimproved the cyclic oxidation resistance of TiAl alloys. The oxides formed wereTiO2andAl2O3, which contained the alloying elements ofCr,Nb, andW. Nitrides formed wereTiNandTi2AlN.

Keywords: Intermetallics; TiAl; tungsten; oxidation (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X10013539

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