Kinetics of Cottrell atmosphere formation during strain aging of ultra-low carbon steels

A model has been developed based on Cottrell's theory to describe the formation of Cottrell atmosphere by taking into account the effect of the decrease in the concentration of carbon atoms in solution, the saturation of the dislocations and the segregation of carbon atoms to grain boundaries....

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Bibliographic Details
Published in:Materials letters 2000-07, Vol.44 (6), p.374-378
Main Authors: Zhao, J.Z, De, A.K, De Cooman, B.C
Format: Article
Language:English
Subjects:
Aging
Applied sciences
Cross-disciplinary physics: materials science
rheology
Deformation, plasticity, and creep
Dislocations
Exact sciences and technology
Grain boundaries
Kinetics
Materials science
Metals. Metallurgy
Physics
Segregation
Steels
Treatment of materials and its effects on microstructure and properties
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Summary:A model has been developed based on Cottrell's theory to describe the formation of Cottrell atmosphere by taking into account the effect of the decrease in the concentration of carbon atoms in solution, the saturation of the dislocations and the segregation of carbon atoms to grain boundaries. The strain aging of an ultra-low carbon bake hardening steel has been investigated both theoretically with this model and experimentally. It is indicated that the model describes the formation of Cottrell atmosphere much more reasonably than Cottrell's formula does.
ISSN:0167-577X
1873-4979
DOI:10.1016/S0167-577X(00)00062-8