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- KAMIJO Taichi
- Yokohama National University, Faculty of Engineering, Department of Mechanical Engineering and Materials Science
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- KOMATSUBARA Toshio
- Sky Alminum CO., LTD.
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- SATO Michitaka
- Bridgestone CO., LTD.
Bibliographic Information
- Other Title
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- Al‐Cu合金におけるG.P.ゾーン形成の駆動エネルギー
- Al Cu ゴウキン ニ オケル G . P . ゾーン ケイセイ ノ クドウ
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Abstract
The increase in free energy accompanying the formation of G. P. zone in an Al-2at% Cu alloy was discussed in terms of the changes in binding enthalpy, configurational entropy and strain energy. As far as the driving force for precipitation is derived from the decrease in binding enthalpy of the system, segregation of copper atoms to (100) planes in the aluminum lattice against the decrease in configurational entropy, can not take place at temperatures higher than about-100°C. Since the change in free energy shows a monotonous increase according to the increase in the radius of G. P. zone, the preferential formation of platelet-type precipitates does not occur at a normal aging temperature. The amounts of strain energy around G. P. zones and solute copper atoms were evaluated by a finite element method, and it is shown that the strain energy of copper atom is largest in a solid solution. While the strain energy around G. P. zones increases approximately in proportion to their radii, a strain energy of copper atom or a total strain energy of the system decreases progressively with respect to the growth of platelets. Therefore, the G. P. zone in an Al-Cu alloy is formed mainly through the relaxation of strain energy around solute copper atoms.
Journal
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- Journal of Japan Institute of Light Metals
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Journal of Japan Institute of Light Metals 37 (11), 742-747, 1987
The Japan Institute of Light Metals
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Keywords
Details 詳細情報について
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- CRID
- 1390282681316376576
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- NII Article ID
- 130004075757
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- NII Book ID
- AN00069773
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- ISSN
- 18808018
- 04515994
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- NDL BIB ID
- 3157727
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed