Accession Number:

AD0601654

Title:

RESISTOMETRIC INVESTIGATION OF THE RECOVERY OF DILUTED A1-MG ALLOYS COLD-WORKED AT LIQUID NITROGEN TEMPERATURE.

Descriptive Note:

Final rept. 1 Jan-31 Dec 63.

Corporate Author:

ISTITUTO SPERIMENTALE DEI METALLI LEGGERI MILAN (ITALY)

Personal Author(s):

Report Date:

1964-01-30

Pagination or Media Count:

49.0

Abstract:

A set of diluted A1-Mg alloys, with a Mg content varying from 0 99.995A1 to 1.48 at. , has been cold-worked by compression at liquid-nitrogen temperature, and the recovery of the electrical resistivity has been investigated in the temperature range from -190C to 340C. Four principal recovery stages, conventionally indicated as H-1, H-2, H-3 and H-4, can be envisaged, during the isochronal annealing, in pure Al as well as in the alloys. Stages H-2 and H-3, which appeared as the most important recovery stages, have been investigated in more detail by the isothermal annealing method. A tentative interpretation of the results has been advanced, assuming that the four recovery stages observed in alloys corresponds substantially to the same observed in pure Al. In this way stage H-1 can be identified with the release of interstitial-type defects from their traps stage H-2 can be identified with the migration of vacancies to dislocations stages H-3 and H-4 can be identified with the removal of dislocations by the polygonization and recristallization processes, respectively.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE