Effect of Sc and Gd on high temperature oxidation resistance of Ti-36Al cast alloy

 
N.Poryadchenko,
 
E.A. Nevinchana,
 
I.Yu. Okun’,
  

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Electron Microscopy and Strength of Materials - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2009, #16
http://www.materials.kiev.ua/article/352

Abstract

Different character of effect of alloying with Sc and Gd on oxidation resistance of titanium intermetallic Ti-36Al alloy at 900 0C was established. It was showed that only small addition of Sc (0,05-0,09-wt. %) increased alloy oxidation resistance in contrast to Gd influence that growth of Gd content from 0,09 to 0,7-wt. % resulted in consistent decreasing of oxidation rate of alloys. Addition of 0,09-wt. % Sc or 0,7-wt. % Gd was established to decrease a mass gain at oxidation in five times in contrast with a mass gain at oxidation of an initial Ti-36Al alloy.