Abstract
Grain boundary mobility in preferential growth of cube grains ({100}〈001〉) was evaluated by in-situ electron back scattering diffraction pattern (EBSP) analysis in order to clarify the fundamental mechanism of primary recrystallization in pure aluminum foils of 99.9% purity thermo-mechanically processed in the industrial production route for aluminum foils for electrolytic capacitors. We have carried out the continuous EBSP measurements during recrystallization of the aluminum foils heated to various temperatures in the chamber of scanning electron microscopy (SEM). We have succeeded in dynamic observation of the preferential growth of cube grains by the in-situ EBSP analysis. The in-situ EBSP analysis could reveal the migration rate of grain boundaries surrounding the cube grains. It was clarified that the proportional relation between migration rate and annealing time was satisfied. The stored energy providing the driving force for the grain boundary migration during primary recrystallization could be estimated from the misorientation within the deformed grains. The mobility of the grain boundary could be evaluated using the measured grain boundary migration rate and stored energy. Then the activation energy could be estimated by the in-situ EBSP analysis at various temperatures ranging from 270°C to 310°C. The obtained activation energy was 124 kJ/mol, which approximately corresponded to that for the diffusion of impurity such as iron or silicon in aluminum. This suggested that the rate-determining process of the grain boundary migration of cube grains was impurity diffusion in the pure aluminum foils.
| Original language | English |
|---|---|
| Title of host publication | Recrystallization and Grain Growth III - Proceedings of the Third International Conference on Recrystallization and Grain Growth, ReX and GG III |
| Pages | 351-356 |
| Number of pages | 6 |
| Edition | PART 1 |
| Publication status | Published - Dec 1 2007 |
| Event | 3rd International Conference on Recrystallization and Grain Growth, ReX GG III - Jeju Island, Korea, Republic of Duration: Jun 10 2007 → Jun 15 2007 |
Publication series
| Name | Materials Science Forum |
|---|---|
| Number | PART 1 |
| Volume | 558-559 |
| ISSN (Print) | 0255-5476 |
Other
| Other | 3rd International Conference on Recrystallization and Grain Growth, ReX GG III |
|---|---|
| Country | Korea, Republic of |
| City | Jeju Island |
| Period | 6/10/07 → 6/15/07 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
In-situ EBSP analysis of grain boundary migration during recrystallization in pure aluminum foils. / Takata, Naoki; Ikeda, Ken Ichi; Nakashima, Hideharu; Tsuji, Nobuhiro.
Recrystallization and Grain Growth III - Proceedings of the Third International Conference on Recrystallization and Grain Growth, ReX and GG III. PART 1. ed. 2007. p. 351-356 (Materials Science Forum; Vol. 558-559, No. PART 1).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - In-situ EBSP analysis of grain boundary migration during recrystallization in pure aluminum foils
AU - Takata, Naoki
AU - Ikeda, Ken Ichi
AU - Nakashima, Hideharu
AU - Tsuji, Nobuhiro
PY - 2007/12/1
Y1 - 2007/12/1
N2 - Grain boundary mobility in preferential growth of cube grains ({100}〈001〉) was evaluated by in-situ electron back scattering diffraction pattern (EBSP) analysis in order to clarify the fundamental mechanism of primary recrystallization in pure aluminum foils of 99.9% purity thermo-mechanically processed in the industrial production route for aluminum foils for electrolytic capacitors. We have carried out the continuous EBSP measurements during recrystallization of the aluminum foils heated to various temperatures in the chamber of scanning electron microscopy (SEM). We have succeeded in dynamic observation of the preferential growth of cube grains by the in-situ EBSP analysis. The in-situ EBSP analysis could reveal the migration rate of grain boundaries surrounding the cube grains. It was clarified that the proportional relation between migration rate and annealing time was satisfied. The stored energy providing the driving force for the grain boundary migration during primary recrystallization could be estimated from the misorientation within the deformed grains. The mobility of the grain boundary could be evaluated using the measured grain boundary migration rate and stored energy. Then the activation energy could be estimated by the in-situ EBSP analysis at various temperatures ranging from 270°C to 310°C. The obtained activation energy was 124 kJ/mol, which approximately corresponded to that for the diffusion of impurity such as iron or silicon in aluminum. This suggested that the rate-determining process of the grain boundary migration of cube grains was impurity diffusion in the pure aluminum foils.
AB - Grain boundary mobility in preferential growth of cube grains ({100}〈001〉) was evaluated by in-situ electron back scattering diffraction pattern (EBSP) analysis in order to clarify the fundamental mechanism of primary recrystallization in pure aluminum foils of 99.9% purity thermo-mechanically processed in the industrial production route for aluminum foils for electrolytic capacitors. We have carried out the continuous EBSP measurements during recrystallization of the aluminum foils heated to various temperatures in the chamber of scanning electron microscopy (SEM). We have succeeded in dynamic observation of the preferential growth of cube grains by the in-situ EBSP analysis. The in-situ EBSP analysis could reveal the migration rate of grain boundaries surrounding the cube grains. It was clarified that the proportional relation between migration rate and annealing time was satisfied. The stored energy providing the driving force for the grain boundary migration during primary recrystallization could be estimated from the misorientation within the deformed grains. The mobility of the grain boundary could be evaluated using the measured grain boundary migration rate and stored energy. Then the activation energy could be estimated by the in-situ EBSP analysis at various temperatures ranging from 270°C to 310°C. The obtained activation energy was 124 kJ/mol, which approximately corresponded to that for the diffusion of impurity such as iron or silicon in aluminum. This suggested that the rate-determining process of the grain boundary migration of cube grains was impurity diffusion in the pure aluminum foils.
UR - http://www.scopus.com/inward/record.url?scp=38349178794&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38349178794&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:38349178794
SN - 087849443X
SN - 9780878494439
T3 - Materials Science Forum
SP - 351
EP - 356
BT - Recrystallization and Grain Growth III - Proceedings of the Third International Conference on Recrystallization and Grain Growth, ReX and GG III
ER -