Microstructure evolution and activation energy during superplastic deformation of FeAl based intermetallics

Journal Article · Sun Jun 01 00:00:00 EDT 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(97)00021-3· OSTI ID:509162

Li, D; Lin, D ^[1]

---

1. Shanghai Jiao Tong Univ. (China)

At the temperature range from 875 C to 1,000 C under an initial strain rate range of 10{sup {minus}4}s{sup {minus}1} to 10{sup {minus}1}s{sup {minus}1}, the flow activation energy of FeAl based alloys were measured to be 370kJ {center_dot} mol{sup {minus}1} for Fe-36.5A, 290kJ {center_dot} mol{sup {minus}1} for Fe-36.5Al-1Ti and 260kJ {center_dot} mol{sup {minus}1} for Fe-36.5Al-2Ti alloy. During the superplastic deformation, the new small grains were separated from the original larger deformed grains and the average grain size became much finer from above 500{micro}m before deformation to 50--85{micro}m after deformation to fracture. It is confirmed that a continuous recrystallization process took place and superplasticity may result in this process.

• OSTI ID: 509162
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 11 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACTIVATION ENERGY
ALUMINIUM ALLOYS
DEFORMATION
EXPERIMENTAL DATA
GRAIN SIZE
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MICROSTRUCTURE
PLASTICITY
RECRYSTALLIZATION
STRAIN RATE