Thermally activated energy, which varies linearly with static recovered strain, is calculated from static recovery experiments of pure aluminum initially plastically deformed by strain-rate-controlled tensile tests up to 10% engineering strain at room temperature. The activation energy at the initial static recovery is 20 kJ mol−1, which is much less than that of pure copper and attributed to the dislocation annihilation by glide or cross-slip as well as higher stacking fault energy. Once dislocation annihilation processes are exhausted, more energy is required for subgrains to form and then grow. Eventually the recovered strain is slowed down and gradually saturated.
Issue Section:
Technical Brief
References
1.
Humphreys
, F. J.
, and Hatherly
, M.
, 2004
, Recrystallization and Related Annealing Phenomena
, 2nd ed., Elsevier
, Oxford, UK
.2.
Beck
, P. A.
, 1954
, “Annealing of Cold Worked Metals
,” Adv. Phys.
, 3
(11
), pp. 245
–324
.10.1080/000187354001012033.
Li
, J. C. M.
, 1965
, Recovery Processes in Metals (Recrystallization, Grain Growth, and Textures)
, ASM
, Metals Park
, pp. 45
–98
.4.
Nes
, E.
, 1995
, “Recovery Revisited
,” Acta Metall. Mater.
, 43
(6
), pp. 2189
–2207
.10.1016/0956-7151(94)00409-95.
Chang
, B. T. A.
, and Li
, J. C. M.
, 1980
, “Indentation Recovery of Atactic Polystyrene
,” J. Mater. Sci.,
15
(6), pp. 1364
–1370
.10.1007/BF007521156.
Chang
, B. T. A.
, and Li
, J. C. M.
, 1981
, “Recovery of Compressive Strain in Atactic Polystyrene
,” J. Mater. Sci.
, 16
(4), pp. 889
–899
.10.1007/BF005427327.
Kuo
, C. M.
, and Lin
, C. S.
, 2007
, “Static Recovery Activation Energy of Pure Copper at Room Temperature
,” Scr. Mater.
, 57
(8), pp. 667
–670
.10.1016/j.scriptamat.2007.06.0548.
Hirth
, J. P.
, and Lothe
, J.
, 1982
, Theory of Dislocations
, 2nd ed., Wiley
, New York
, pp. 839
.9.
Carter
, C. B.
, and Ray
, I. L. F.
, 1977
, “On the Stacking-Fault Energies of Copper Alloys
,” Philos. Mag.
, 35
(1
), pp. 189
–200
.10.1080/1478643770823598210.
ASTM E 8/E 8M
, 2008
, Standard Test Methods for Tension Testing of Metallic Materials (Annual Book of ASTM Standards), ASTM International
, Philadelphia
, Vol. 03.01.10.1520/E0008_E0008M11.
Friedel
, J.
, 1964
, Dislocations
, Pergamon
, Oxford, UK
, p. 277
.12.
Abbaschian
, R.
, Abbaschian
, L.
, and Reed-Hill
, R. E.
, 2010
, Physical Metallurgy Principles
, 4th ed., Cengage Learning
, Stamford
, CT, pp. 222
.13.
Frost
, H. J.
, and Ashby
, M. F.
, 1982
, Deformation-Mechanism Maps
, Pergamon
, Oxford, UK
, p. 21
.Copyright © 2014 by ASME
You do not currently have access to this content.