Microstructural development during cold deformation and recrystallisation of 2014 AI–AI2O3particulate composite
作者:
FerryM.,
MunroeP.,
CroskyA.,
ChandraT.,
期刊:
Materials Science and Technology
(Taylor Available online 1992)
卷期:
Volume 8,
issue 1
页码: 43-51
ISSN:0267-0836
年代: 1992
DOI:10.1179/026708392790169894
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractThe recrystallisation behaviour has been studied in a cold worked 2014 Al–Al2O3particulate reinforced composite which was heat treated to produce two markedly different initial matrix microstructures. The composite was cold deformed to a reduction of either 30 or 50% and then annealed for various times at temperatures in the range 100–500°C. The microstructural development during recrystallisation was studied using optical and transmission electron microscopy (TEM). The recrystallisation kinetics were monitored via hardness measurements and the results correlated with the microstructural analysis. It was observed that the kinetics and temperature of recrystallisation were dependent on the original heat treatment. A detailed TEM investigation indicated that nucleation occurs preferentially at individual and clustered Al2O3particles, but the progress of recrystallisation was controlled by the distribution of dispersoid particles in the matrix. Recrystallisation proceeded rapidly in the composite containing large stable dispersoids. In contrast, when precipitation occurred during annealing, recrystallisation was severely retarded and was controlled by the fine precipitate dispersion.MST/1566
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