Factors affecting the nitridation behavior of Fe-base, Ni-base, and Co-base alloys in pure nitrogen

J.J. Barnes; G.Y. Lai

doi:doi:10.1051/jp4:1993915

Numéro		J. Phys. IV France Volume 03, Numéro C9, Décembre 1993 Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température


Page(s)		C9-167 - C9-174
DOI		http://dx.doi.org/10.1051/jp4:1993915

Proceedings of the 3rd International Symposium on High Temperature Corrosion and Protection of Materials
Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température

J. Phys. IV France 03 (1993) C9-167-C9-174
DOI: 10.1051/jp4:1993915

Factors affecting the nitridation behavior of Fe-base, Ni-base, and Co-base alloys in pure nitrogen

J.J. Barnes and G.Y. Lai

Haynes International, Inc., Kokomo, Indiana, U.S.A.

Abstract
The behavior of alloys in nitrogen at high temperature is relevant to many industrial applications. Embrittlement due to internal nitride formation is the principal problem encountered in service. In this study, the nitridation resistance of a series of alloys in pure nitrogen at 1093 °C was investigated. For Fe-base, Ni-base, and Co-base alloys the amount of nitrogen absorbed and the nature and morphology of the nitrides formed was studied. It was found that alloys rich in nickel were most resistant to nitridation. Most of the alloys formed internal chromium nitrides. The Al-containing alloys with about 4.5 wt% Al, formed a surface scale of AlN and was very resistant to nitridation attack.