Improvement of the oxidation resistance of EPM gamma-TiAl alloy by Y-addition
SCIE
SCOPUS
- Title
- Improvement of the oxidation resistance of EPM gamma-TiAl alloy by Y-addition
- Authors
- Wu, Y; Hwang, SK; Nam, SW; Kim, NJ
- Date Issued
- 2003-01
- Publisher
- TRANS TECH PUBLICATIONS LTD
- Abstract
- Oxidation resistance is a key issue in the gamma TiAl alloy to be used at elevated temperature air environment. In the present study, effect of Y addition on the oxidation resistance of Ti-46.6Al-1.4Mn-2Mo alloy was investigated. Preparation of the experimental alloy was according to the elemental powder metallurgy (EPM), which consisted of blending elemental powders, compaction and hot extrusion. A fully lamellar microstructure was obtained by heat treatment. With Y-addition the microstructure, in terms of the grain size and the lamellar thickness, was greatly refined. The beneficial effect of Y-addition was most apparent in the oxidation resistance in air at 800degreesC. The enhanced oxidation resistance was attributed to two factors, reduction of the internal oxygen and formation of multi-scale, Y-containing oxide film retarding penetration of external oxygen in the air environment.
- Keywords
- TiAl; oxidation; oxides; EPM; Y-effect; microstructure; MECHANICAL-PROPERTIES; MICROSTRUCTURAL REFINEMENT; CARBON
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29768
- DOI
- 10.4028/www.scientific.net/MSF.426-432.1807
- ISSN
- 0255-5476
- Article Type
- Article
- Citation
- MATERIALS SCIENCE FORUM, vol. 426-4, page. 1807 - 1812, 2003-01
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- There are no files associated with this item.
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