Annealing twin development during recrystallization and grain growth in pure nickel

A 99.995% pure Ni sample, compressed to 25%, was annealed in a SEM chamber and changes in the density of annealing twins were monitored in situ during recrystallization and grain growth. In addition to average microstructural measurements, the evolution of individual grains was also observed. Both t...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2014-03, Vol.597, p.295-303
Main Authors: Jin, Y., Lin, B., Bernacki, M., Rohrer, G.S., Rollett, A.D., Bozzolo, N.
Format: Article
Language:English
Subjects:
Annealing
Annealing twin
Applied sciences
Cold working, work hardening
annealing, quenching, tempering, recovery, and recrystallization
textures
Cross-disciplinary physics: materials science
rheology
Density
EBSD
Engineering Sciences
Exact sciences and technology
Formations
Grain growth
Grains
Heat treatment
In situ annealing
Materials
Materials science
Metals. Metallurgy
Microstructure
Nickel
Physics
Production techniques
Recrystallization
Treatment of materials and its effects on microstructure and properties
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Summary:A 99.995% pure Ni sample, compressed to 25%, was annealed in a SEM chamber and changes in the density of annealing twins were monitored in situ during recrystallization and grain growth. In addition to average microstructural measurements, the evolution of individual grains was also observed. Both the average annealing twin density in the recrystallized domain and the annealing twin density per grain increased during recrystallization. The rate of increase in twin density correlates with the velocity of the recrystallization front. During grain growth, however, the average annealing twin density decreased. The in situ EBSD observations showed both the formation of new twins and the extension of existing twins during annealing. The observations reported here suggest that the existing models for annealing twin formation are incomplete.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2014.01.018