Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10227037 | Corrosion Science | 2018 | 27 Pages |
Abstract
Shot peening, although generally accepted as a useful surface treatment method to improve oxidation resistance of Ni-, Co- and Fe-based alloys, has been less applied to TiAl based alloys. This work shows that a shot peening treatment converts the Ti-45Al-2Nb-2Mn-1B alloy from thermally growing TiO2-Al2O3 mixed oxides to an exclusive Al2O3 in air at 900â°C. The basic reason for this is that the shot peening catalyzes formation of an α-Al2O3 thin film, which prevents Ti of the alloy from oxidation at the high temperature. The slow oxidation of the shot-peened alloy mitigates the degradation of typical γ/α2 lamellar microstructure.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Y. Huang, X. Peng, Z. Dong, Y. Cui,