Negative Temperature Dependence of Recrystallized Grain Size: Formulation and Experimental Confirmation on Copper

The catalyzing effect on nucleation of recrystallization from existing grains resulting from previous lower temperature deformation is analyzed, analogous to the size effect of foreign nucleus in heterogeneous nucleation. Analytical formulation of the effective nucleation site for recrystallization...

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Bibliographic Details
Published in:Materials 2017-03, Vol.10 (3), p.308
Main Authors: Elmasry, Mohamed, Liu, Fan, Jiang, Yao, Mao, Ze Ning, Liu, Ying, Wang, Jing Tao
Format: Article
Language:English
Subjects:
Annealing
Copper
Deformation analysis
Deformation effects
Grain size
Nucleation
Plastic deformation
Recrystallization
Size effects
Temperature
Temperature dependence
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Summary:The catalyzing effect on nucleation of recrystallization from existing grains resulting from previous lower temperature deformation is analyzed, analogous to the size effect of foreign nucleus in heterogeneous nucleation. Analytical formulation of the effective nucleation site for recrystallization leads to a negative temperature dependence of recrystallized grain size of metals. Non-isochronal annealing-where annealing time is set just enough for the completion of recrystallization at different temperatures-is conducted on pure copper after severe plastic deformation. More homogeneous and smaller grains are obtained at higher annealing temperature. The good fit between analytical and experimental results unveils the intrinsic feature of this negative temperature dependence of recrystallized grain size.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma10030308