Structural evolution and grain growth kinetics of the mechanically alloyed Fe50Al50 during heat treatment.
Nanocrystalline FeAl powder is synthesized by subsequent heat treating the Fe50Al50 (at.%) alloy prepared by mechanical alloying. During annealing the milled FeAl powder, the grain growth of B2-FeAl occurs with the order transformation from Fe(Al) to B2-FeAl. The activation energy for the nanocrystalline FeAl growth is calculated to be 534.9 kJ/mol, according to the kinetics theory of nanocrystalline growth. The grain growth of FeAl is significantly inhibited especially at elevated temperature.
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, PR China.
Rong
R
Ren
Yucheng
Y
Wu
Wenming
W
Tang
Fengtao
F
Wang
Zhixiang
Z
Zheng