Abstract
Small-angle X-ray scattering techniques and hardness measurements have been used to study preprecipitation in two Al/Zn/Mg alloys containing the same Zn content (2.46 at. %) but different Mg contents. Changes in Guinier-Preston (G-P) zone size are observed to follow the same pattern as changes in hardness. It is also observed that a critical zone size is required for the nucleation of the intermediate precipitate,η∼'; the size being dependent on the Mg content. The role of Mg as a reversible-vacancy trap is also established.
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References
I. J. Polmear,J. Inst. Metals 86 (1957–58) 113.
Idem, ibid 87 (1958–59) 24.
Idem, J. Aust. Inst. Met. 11 (1966) 246.
G. W. Lorimer andR. B. Nicholson,Acta Met. 14 (1966) 1109.
R. B. Nicholson, G. Thomas, andJ. Nutting,J. Inst. Metals 87 (1958–59) 429.
Idem, Acta Met. 8 (1960) 172.
J. D. Embury andR. B. Nicholson,ibid 13 (1965) 403.
G. Thomas, andJ. Nutting J. Inst. Metals 88 (1959–60) 81.
Y. Murakami, S. Komatsu, andK. Nagata,Men. Fac. Eng., Kyoto U., XXIX part 2 (1967) 161.
C. Panseri andT. Federighi,Acta Met. 8 (1960) 217.
Idem, ibid 11 (1964) 575.
G. Bartsch,ibid 12 (1964) 270.
V. Gerold andR. W. Gould,ibid p. 954.
R. Graf,Compt. rend. 242 (1956) 1311.
Idem, ibid 244 (1957) 337.
A. Guinier, “Solid State Physics”, Vol. 9 (Academic Press, New York, 1959).
R. W. Gould andE. A. Starke Jr, “Advances in X-ray Analysis”, Vol. 9 (Plenum Press, New York, 1966) p. 59.
M. Ipohorski andA. Bonfiglioli,J. Materials Sci. 2 (1967) 371.
L. F. Mondolfo, N. A. Gjostein, andD. W. Levinson,J. Metals 8 (1956) 378.
H. A. Holl,J. Inst. Metals 93 (1964–65) 364.
O. Kratky, I. Pilz, andP. J. Schmitz,J. Colloid and Interface Sci. 21 (1966) 24.
E. A. Starke Jr, andE. U. Lee,Matl. Res. Bull. 2 (1967) 231.
A. Guinier andG. Fournet, “Small Angle Scattering of X-rays” (Wiley, New York, 1955).
E. R. Parker andT. H. Hazlett, in “Relation of Properties to Microstructure” (Amer. Soc. Metals, Cleveland, 1954).
V. Gerold andH. Schmalzried,Z. Metalk. 49 (1958) 291.
V. Gerold andH. Haberkorn,ibid 50 (1959) 568.
A. J. Perry,Acta Met. 14 (1966) 1143.
R. Baur andV. Gerold,ibid 12 (1964) 1444.
A. Guinier, “X-ray Diffraction” (Freeman, London, 1963).
V. Gerold,Phys. Status Solidi 1 (1961) 37.
S. D. Harkness, R. W. Gould, andJ. J. Hren, to be published.
B. Belboech andA. Guinier,Acta Met. 3 (1955) 370.
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Bardhan, P., Starke, E.A. Preprecipitation in Al/Zn/Mg alloys studied by hardness and small-angle X-ray scattering measurements. J Mater Sci 3, 577–583 (1968). https://doi.org/10.1007/BF00757902
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DOI: https://doi.org/10.1007/BF00757902