Alに富むAl-Zn, Al-Ag合金の復元現象について

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タイトル別名
  • On the Reversion of Al-rich Al-Zn and Al-Ag Alloys
  • Al ニ トム Al-Zn , Al-Ag ゴウキン ノ フクゲン ゲンショウ ニ ツイテ

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The changes of electrical resistance and small angle scattering of X-ray for Al-Zn alloys aged at various temperature were compared with the cases of Al-Ag alloys in order to know the behaviour of zones during the reversion treatments. Results obtained are as follows: (1) Small angle scattering of CuKα radiation from Al-30 wt%Zn alloys annealed at temperatures higher than 94°C show that zones exist at these temperatures. (2) There are maximum in isothermal aging curves obtained at 130°∼140°C for Al-10 wt%Zn alloy. Therefore, zones are formed at these temperes. (3) At temperatures higher than 94°C, electrical resistance of specimens of an Al-10 wt%Zn alloy decreases when the annealing temperature is raised, and increases again when temperature is lowered. These results support the above mentioned existence of zones. (4) Electrical resistance of specimens of aged Al-Zn alloys is decreased by reversion treatment to the values which are obtained by annealing the as quenched specimens for same period at same temperature as reversion treatments. (5) Electrical resistance of Al-Ag alloys is increased by reversion treatments to the values which are obtained by annealing the as quenched specimens for same period at same temperature as reversion treatments, but does not arrive at the as quenched value. (6) On re-aging, electrical resistance of specimens of Al-Zn alloys increases slowly, but that of Al-Ag alloys decreases.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 27 (3), 140-145, 1963

    公益社団法人 日本金属学会

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