日本金属学会誌

J. Japan Inst. Metals, Vol. 43, No. 12 (1979),
pp. 1127-1131

Dislocations in Aluminum Sheets at High Temperatures

Yasuhiro Miura1, Minoru Furukawa2, Kenji Fujiyama3 and Hiroya Kaieda4

1Department of Metallurgy, Faculty of Engineering, Kyushu University, Fukuoka
2Faculty of Education, Fukuoka University of Education, Munakata Fukuoka-ken
3Graduate School, Kyushu University, Fukuoka
4Department of Metallurgy, Faculty of Engineering, Kyushu University, Fukuoka. Present address: Miyakonojo Technical College, Miyakonojo

Abstract:

Dislocations in aluminum sheets were observed at high temperatures and at room temperature by means of X-ray topography, and the annihilation process and the nature of dislocations were discussed.
Approximately linear relation has been found between the reciprocal of dislocation density and the time of isothermal annealing, and the annealing process is explained in terms of the theory of dislocation network growth. The apparent activation energy of the process is estimated to be 1.8 eV.
The majority of dislocations in well annealed sheets, observed at room temperature, had a strong edge component and did not lie on the exact 111 planes.


(Received 1979/04/16)

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