Al-Zn-Mg合金の時効硬化におよぼすAuの微量添加の影響

藤川 辰一郎; 平野 賢一

doi:10.2464/jilm.22.199

Effects of addition of a small amount of gold on age-hardening of Al-Zn-Mg alloy

Shinichiro FUJIKAWA, Kenichi HIRANO

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JOURNAL FREE ACCESS

1972 Volume 22 Issue 3 Pages 199-210

DOI https://doi.org/10.2464/jilm.22.199

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Published: March 30, 1972 Received: November 20, 1971 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: CITATION Details: Wrong : 1) I. J. Polmear: J. Inst. Metals, 89 (1961-62), 51.
2) M, v. Heimendahl: phys. stat, sol., 10 (1965), k131.
3) M. v. Heimendahl: Z. Metallk'de, 58 (1967), 230.
4) H. Schmalzried and V. Gerold: Z. Metallk'de, 49 (1958), 292.
5) V. Gerold and H. Haberkorn: Z. Metallk'de, 50 (1959), 568.
6) R. Graf: Compt. Rend., 242 (1956), 2834, 243 (1957), 337.
7) R. Graf: J. Inst. Metals, 86 (1957-58), 535 (Discussion)
8) L. F. Modolfo, N. A. Gjostein and D. W. Levinson: Trans. AIME, 206 (1956), 1378.
9) K. Hirano and Y. Takagi: J. Phys. Soc. Japan, 10 (1955), 187.
10) K. Asano and K. Hirano: Trans. JIM, 9 (1968), 24.
11) H. Nishimura and Y. Murakami: Mem. Fac. Eng. Kyoto Univ., 12 (1950), 47.
12) G. Thomas and J. Nutting: J. Inst. Metals, 88 (1958-60), 80.
13) J. Gjonnes and Chr. J. Simensen: Acta Met., 18 (1970), 881.
14) P. N. T. Unwin, G. W. Lorimer and R. B. Nicholson: Acta Met., 13 (1965), 403.
15) O. Kawano, Y. Murakami, T. Nakazawa and K. S. Liu: Trans. JIM, 11 (1970), 12.
16) S. Fujikawa, K. Hirano and M. Hirabayashi: Z. Metallk'de 59 (1968), 782.
18) Y. Baba: Trans. JIM, 7 (1966), 224.
19) J. W. Cahn and J. E. Hilliard: J. Chem. Phys., 28 (1958), 258; 31 (1959), 688; Acta Met., 9 (1961), 795; 10 (1962), 179
20) L. F. Mondolfo: Met. Rev. No. 153 (1971), 108.
21) G. W. Paul and L. E. Marc de Chazal: I & EC Fundamentals, 8 (1969), 104.
23) M. Doyama: Phys. Rev, 148 (1966), 681.
24) G. W. Lorimer and R. B. Nicholson: Acta Met., 14 (1966), 1009.
25) P. N. T. Unwin, G. W. Lorimer and R. B. Nicholson: Acta Met., 17 (1969), 1363.
27) J. P. Hirth and G. M. Pound: Progress in Materials Science, 11 (1963), 41.
28) N. Ryum, B. Haegland and T. Lindtveit: Z. Metallk'de, 58 (1967), 28.
29) N. Ryum: Acta Met., 16 (1968), 327.

Right : 1) I. J. Polmear: J. Inst. Metals, 89 (1961-62), 51.
2) M, v. Heimendahl: phys. stat. sol., 10 (1965), k131.
3) M. v. Heimendahl: Z. Metallk'de, 58 (1967), 230.
4) H. Schmalzried and V. Gerold: Z. Metallk'de, 49 (1958), 292.
5) V. Gerold and H. Haberkorn: Z. Metallk'de, 50 (1959), 568.
6) R. Graf: Compt. Rend., 242 (1956), 2834, 243 (1957), 337.
7) R. Graf: J. Inst. Metals, 86 (1957-58), 535 (Discussion)
8) L. F. Modolfo, N. A. Gjostein and D. W. Levinson: Trans. AIME, 206 (1956), 1378.
9) K. Hirano and Y. Takagi: J. Phys. Soc. Japan, 10 (1955), 187.
10) K. Asano and K. Hirano: Trans. JIM, 9 (1968), 24.
11) H. Nishimura and Y. Murakami: Mem. Fac. Eng. Kyoto Univ., 12 (1950), 47.
12) G. Thomas and J. Nutting: J. Inst. Metals, 88 (1958-60), 80.
13) J. Gjonnes and Chr. J. Simensen: Acta Met., 18 (1970), 881.
14) P. N. T. Unwin, G. W. Lorimer and R. B. Nicholson: Acta Met., 13 (1965), 403.
15) O. Kawano, Y. Murakami, T. Nakazawa and K. S. Liu: Trans. JIM, 11 (1970), 12.
16) S. Fujikawa, K. Hirano and M. Hirabayashi: Z. Metallk'de 59 (1968), 782.
18) Y. Baba: Trans. JIM, 7 (1966), 224.
19) J. W. Cahn and J. E. Hilliard: J. Chem. Phys., 28 (1958), 258; 31 (1959), 688; Acta Met., 9 (1961), 795; 10 (1962), 179
20) L. F. Mondolfo: Met. Rev. No. 153 (1971), 108.
21) G. W. Paul and L. E. Marc de Chazal: I & EC Fundamentals, 8 (1969), 104.
23) M. Doyama: Phys. Rev, 148 (1966), 681.
24) G. W. Lorimer and R. B. Nicholson: Acta Met., 14 (1966), 1009.
25) P. N. T. Unwin, G. W. Lorimer and R. B. Nicholson: Acta Met., 17 (1969), 1363.
27) J. P. Hirth and G. M. Pound: Progress in Materials Science, 11 (1963), 41.
28) N. Ryum, B. Haegland and T. Lindtveit: Z. Metallk'de, 58 (1967), 28.
29) N. Ryum: Acta Met., 16 (1968), 327.

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

Abstract

The effects of gold addition (0.00070.04at.%) on the age-hardening of Al-5wt.% (2.09at.%) Zn-2wt.% (2.24at.%) Mg alloy were investigated by measurements of hardness, tensile tests, and electron microscopy.
The following results were obtained:
(1) Addition of a small amount of gold remarkably accelerated the age-hardening of Al-Zn-Mg alloy during the ageing in the temperature range of from room temperature to 150°C, particularly at 120°C.
(2) It was shown by electron microscopy that the addition of gold increased the number of precipitated particles which were more uniformly distributed, and made the width of no-precipitate zone along grain boundaries smaller as compared with the case in the pure ternary alloy.
(3) The acceleration of age-hardening by the gold addition may be attributed to the increase of G. P. zones and η'-phases nucleated. Accelerated nucleation of G. P. zones and η'-phases in the alloy containing gold would be related with the fact that the addition of gold reduces the interfacial energy of the critical nucleus of G. P. zones and also acts as catalytic potential for the nucleation of η'-Phases.
(4) The addition of gold was found to have an effect to improve the ductility (elongation) of the alloy in the age-hardened state as well as the effect to accelerate the hardening. These effects depended upon ageing temperature, ageing time, and the additional amount of gold.

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