ON THE RECRYSTALLIZATION OF ALUMINUM ALLOYS CONTAINING ZIRCONIUM (in Japanese)
The effect of zirconium on the recrystallization behavior of cold-rolled aluminum, aluminum--2% copper alloy, and aluminum --2% magnesium alloy has been studied by means of hardness tests and microscopic methods. The results obtained are as follows: (1) The recrystallization temperature was elevated remarkably with increase of the amount of alloying zirconium till the content reaches about 0.3 or 0.5% in aluminum and aluminum -magnesium alloy, independent of the change of the temperature of preliminary annealing before final cold-rolling, and in aluminum --copper alloy upon preliminary annealing at a comparatively low temperature. When the content of zirconium was more than 0.3 to 0.5%, however, the recrystallization temperature was decreased gradually for aluminum and was almost same for aluminum--copper and aluminum--magnesium alloys. (2) The recrystallized grain size after final annealing for each system of alloys become progressively finer with addition of more zirconium till the content reaches about 0.3%. In the specimens with zirconium of more than this content, however, the recrystallized grain size was fairly fine and almost constant against the change of final annealing temperature as well as cold reduction and was also free of infiuence from the variation of the preliminary annealing temperature. (3) Recrystallization diagrams for Al-Zr, Al-Cu-Zr, and Al-Mg-Zr alloys have been proposed, based on the determination of the grain size as a function of rolling reduction and annealing temperature. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-13-017031
- OSTI ID:
- 4268333
- Journal Information:
- Nippon Kinzoku Gakkaishi (Japan), Vol. Vol: 22; Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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