Al-Cu-Cd合金における低温時効遅滞の機構

鈴木 寿; 菅野 幹宏; 福永 和義

doi:10.2464/jilm.22.10_599

Studies on aging retardation in Al-Cu-Cd alloys

Hisashi SUZUKI, Motohiro KANNO, Kazuyoshi FUKUNAGA

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JOURNAL FREE ACCESS

1972 Volume 22 Issue 10 Pages 599-604

DOI https://doi.org/10.2464/jilm.22.10_599

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Published: October 30, 1972 Received: June 13, 1972 Available on J-STAGE: July 23, 2008 Accepted: - Advance online publication: - Revised: -
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Date of correction: July 23, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : The vacancy-trapping model to explain aging retardation in Al-Cu-Sn alloys had been examined by the present authors and the conclusion obtained was that the model had been inadequate and not acceptable. The present study, therefore, was attempted to further examine the same subject in the Al-Cu-Cd system.
Two sorts of alloy systems with 3 and 4wt.% Cu were used. In each alloy system, the Cd content was care-fully varied from 0wt.% to 0.37wt.%.
The results obtained were as follows:
(1) When specimens were of one-phase at the solution temperature, the retardation of aging was not observed at low temperatures. However, the retardation was clearly seen in two-phase specimens as the Cd content increased.
(2) It was found that the retardation in this alloy system was also caused by the decrease of solid solubility of Cu in the a phase at solution temperatures, as in the Al-Cu-Sn alloys.
(3) The theory based on the vacancy-trapping model to explain the aging retardation was again proved to be erroneous in the present study.
Right : The vacancy-trapping model to explain aging retardation in Al-Cu-Sn alloys had been examined by the present authors and the conclusion obtained was that the model had been inadequate and not acceptable. The present study, therefore, was attempted to further examine the same subject in the Al-Cu-Cd system.
Two sorts of alloy systems with 3 and 4wt.% Cu were used. In each alloy system, the Cd content was care-fully varied from 0wt.% to 0.37wt.%.
The results obtained were as follows:
(1) When specimens were of one-phase at the solution temperature, the retardation of aging was not observed at low temperatures. However, the retardation was clearly seen in two-phase specimens as the Cd content increased.
(2) It was found that the retardation in this alloy system was also caused by the decrease of solid solubility of Cu in the α phase at solution temperatures, as in the Al-Cu-Sn alloys.
(3) The theory based on the vacancy-trapping model to explain the aging retardation was again proved to be erroneous in the present study.

Date of correction: July 23, 2008 Reason for correction: - Correction: CITATION Details: Wrong : 1) H. K. Hardy: J. Inst. Metals, 98 (1950~51),169.
2) H. K. Hardy: J. Inst. Metals, 80 (1951~52),483.
3) A. Kelly and R. B. Nicholson: Prog. Mat. Sc., 10 (1961), 271.
4) J. M. Silcock: Phil. Mag., 8 (1959), 1187.
5) H. Kimura and R. R. Hasiguti: Acta Met., 9 (1961), 1076.
9) K. M. Entwistle, J. H. Fell and Kang I1 Koo: J. Inst. Metals, 91 (1962~63), 84.
10) A. J. Perry and K. M. Entwistle: J. Inst. Metals, 96 (1968), 344.
11) M. Ohta and F. Hashimoto: Trans. JIM, 6 (1965), 9.
12) A. J. Perry: Acta Met., 14 (1966), 1143.
13) K. M. Ramman, E. S. D. Das and K. I. Vasu: J. Mater. Sc., 6 (1971), 1367.
16) E. C. Elwood and M. Silcock: J. Inst. Metals, 74 (1948), 457.
17) J. E. Dorn, P. Pietrokowsky and T. E. Tietz: J. Metals, 2 (1950), 933.
18) J. M. Silcock, I. J. Heal and H. K. Hardy: J. Inst. Metals, 84 (1955~56), 23.
19) D. Altenpohl: Aluminum und Aluminum Legierungen. (Springer Verlag), (1965), 427.
20) A. D. King and J. Burke: Acta Met., 18 (1970), 205.
22) N. H. March and J. S. Roussean: Cryst. Lat-tice Defects, 2 (1971), 1.
23) R. W. Gould and V. Gerold: Acta Met., 12 (1964), 954.

Right : 1) H. K. Hardy: J. Inst. Metals, 98 (1950~51),169.
2) H. K. Hardy: J. Inst. Metals, 80 (1951~52),483.
3) A. Kelly and R. B. Nicholson: Prog. Mat. Sc., 10 (1961), 271.
4) J. M. Silcock: Phil. Mag., 8 (1959), 1187.
5) H. Kimura and R. R. Hasiguti: Acta Met., 9 (1961), 1076.
9) K. M. Entwistle, J. H. Fell and Kang I1 Koo: J. Inst. Metals, 91 (1962~63), 84.
10) A. J. Perry and K. M. Entwistle: J. Inst. Metals, 96 (1968), 344.
11) M. Ohta and F. Hashimoto: Trans. JIM, 6 (1965), 9.
12) A. J. Perry: Acta Met., 14 (1966), 1143.
13) K. M. Ramman, E. S. D. Das and K. I. Vasu: J. Mater. Sc., 6 (1971), 1367.
16) E. C. Elwood and M. Silcock: J. Inst. Metals, 74 (1948), 457.
17) J. E. Dorn, P. Pietrokowsky and T. E. Tietz: J. Metals, 2 (1950), 933.
18) J. M. Silcock, I. J. Heal and H. K. Hardy: J. Inst. Metals, 84 (1955~56), 23.
19) D. Altenpohl: Aluminum und Aluminum Legierungen. (Springer Verlag), (1965), 427.
20) A. D. King and J. Burke: Acta Met., 18 (1970), 205.
22) N. H. March and J. S. Roussean: Cryst. Lattice Defects, 2 (1971), 1.
23) R. W. Gould and V. Gerold: Acta Met., 12 (1964), 954.

Date of correction: July 23, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

The vacancy-trapping model to explain aging retardation in Al-Cu-Sn alloys had been examined by the present authors and the conclusion obtained was that the model had been inadequate and not acceptable. The present study, therefore, was attempted to further examine the same subject in the Al-Cu-Cd system.
Two sorts of alloy systems with 3 and 4wt.% Cu were used. In each alloy system, the Cd content was care-fully varied from 0wt.% to 0.37wt.%.
The results obtained were as follows:
(1) When specimens were of one-phase at the solution temperature, the retardation of aging was not observed at low temperatures. However, the retardation was clearly seen in two-phase specimens as the Cd content increased.
(2) It was found that the retardation in this alloy system was also caused by the decrease of solid solubility of Cu in the α phase at solution temperatures, as in the Al-Cu-Sn alloys.
(3) The theory based on the vacancy-trapping model to explain the aging retardation was again proved to be erroneous in the present study.

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