Effect of Yttrium Addition on Nonmetallic Inclusions in FeCrAl Alloys

作者：Ji Chen, Hangyu Zhu, Lanqing Wang, Jixuan Zhao, Shuai Guo · 发表于：steel research international · 年份：2023 · DOI：10.1002/srin.202300212 · 被引用次数：9 · 研究领域：Metallurgical Processes and Thermodynamics、Nuclear Materials and Properties、Iron and Steelmaking Processes

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 Al 2 O 3 inclusions is evident. The higher content of Cr in FeCrAl alloy promotes the formation of Al 2 O 3 . Y addition can effectively modify Al 2 O 3 inclusions to YAlO 3 or YS inclusions. With the addition of 0.0046 wt% Y, the evolution route of inclusions in FeCrAl alloys with reaction time is Al 2 O 3 → YAlO 3 ‐Al 2 O 3 → YAlO 3 . The variation in Al 2 O 3 inclusions with increasing Y content is Al 2 O 3 →YAlO 3 → YS. The experimental results are consistent well with the thermodynamic calculation results.