Affiliation:
1. State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan Hubei 430081 P. R. China
2. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and Technology Wuhan Hubei 430081 P. R. China
Abstract
To investigate the effect of yttrium (Y) addition on nonmetallic inclusions in FeCrAl alloys, a series of laboratory experiments and thermodynamic calculations are carried out as a function of reaction time and Y addition amount. Without Y addition, the main inclusion in FeCrAl alloys is AlN, and only a small amount of Al2O3 inclusions is evident. The higher content of Cr in FeCrAl alloy promotes the formation of Al2O3. Y addition can effectively modify Al2O3 inclusions to YAlO3 or YS inclusions. With the addition of 0.0046 wt% Y, the evolution route of inclusions in FeCrAl alloys with reaction time is Al2O3 → YAlO3‐Al2O3 → YAlO3. The variation in Al2O3 inclusions with increasing Y content is Al2O3 →YAlO3 → YS. The experimental results are consistent well with the thermodynamic calculation results.
Funder
National Natural Science Foundation of China
Subject
Materials Chemistry,Metals and Alloys,Physical and Theoretical Chemistry,Condensed Matter Physics