Structural characterization of FeAl28Cr5 alloy deformed in the hot torsion process

Current research in the field of iron aluminides are directed towards to understand the structural phenomena occurring during plastic deformation of these alloys. The obtained results of the study and collected informations will be used to determine the description of the structural changes taking place during hot deformation of Fe-Al alloys. The article presents the results of the study of the alloy FeAl28Cr5 deformed by hot torsion in temperature range of 800-1100°C and a strain rate of 0.1 s^-1. The analysis of the structure of the alloy FeAl28Cr5 allowed to reveal changes caused by dynamic processes of deformation. The results of torsion tests show the possibility to obtain a fine-grained structure with of parameters of the processes (T=1000°C, 1100°C) and strain of ε = 40. After deformation at strain of (ε = 40) the structure consists of fine grains with a misorientation angle higher than 15°, and the average grain size diameter D = 28.5 micrometers. Deformation at a temperature of T = 1000°C and 1100°C is accompanied by superplastic flow effect.