Title: Recovery, recrystallization and grain growth in Fe3AI-based alloys
Authors: Huang, Y.D. ×
Froyen, Ludo #
Issue Date: May-2002
Publisher: Elsevier sci ltd
Series Title: Intermetallics vol:10 issue:5 pages:473-484
Abstract: The recovery, recrystallization and grain growth of particle-free and particle-containing Fe3Al intermetallics with a total warm reduction of 70% were investigated in the temperature range from 750 to 1115 degreesC. The physical phenomena during annealing were characterized and analyzed based on the observations of microstructure, measurement of long-range order degree and determination of micro-hardness. The reordering occurs due to the removal of antiphase boundary trails resulting from the dislocation rearrangement during annealing. The micro-hardness depends on both the dislocation density and the change of long-range order degree. The addition of alloying elements affects the dependence of hardness on reordering. It also has a great effect on the recovery and recrystallization. The recrystallized nuclei are formed by preferential subgrain growth and grain boundary migration. Due to strong anisotropy of Fe3Al-based alloys, the grain boundary migration resulting from inhomogeneous deformation was frequently observed and the distribution of grain size after annealing was also inhomogeneous. The recrystallization kinetics follows the Kolmogorov-Johnson-Mehl-Avrami (KJMA) relationship. Long-range order and second phase are beneficial in decreasing the grain-boundary mobility. The grain growth kinetics of Fe3Al intermetallics investigated follows the conventional power law equation with a high grain growth exponent of more than 4. Abnormal grain growth in the Fe-28% Al-5% Cr-0.1% Zr-0.5% Mo-0.5% Nb-0.05B% (at.%) alloy was found when it was annealed at 1115 degreesC for 72 h. (C) 2002 Elsevier Science Ltd. All rights reserved.
ISSN: 0966-9795
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

Files in This Item:
File Status SizeFormat
pub01934.pdf Published 799KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science