Title

Annealing Stages in Explosively Deformed Copper

Creator

Gordon, Paul

Brillhart, Donald

Preban, Arnold

Date

1963

Abstract

OFHC copper, explosively deformed at pressures from 75 to 435 kilobars, was found to anneal in several different stages -- a recrystallization stage proceeded by three to four recovery stages. The first recovery stage, at temperatures under 100 C, is marked by an appreciable decrease in density rather than by a density increase as is normally expected in annealing. A sample of high purity copper deformed in tension exhibited at least three of the four recovery stages, including the first stage with its accompanying decrease in density. Evidence was also found that the explosively deformed samples contained high residual internal stresses and, at pressures of 250 kbars and above, a significant gradient in imperfection structure in the deformation direction. This gradient affected the rate of recrystallization but not the prerecrystallization hardness.

Date Issued

1963-05

Extent

12

Corporate Author

Illinois Institute of Technology

Identifier

AD0406761

Corporate Report Number

TR12

AD Number

AD-406 761

NTRL Accession Number

AD406761

Distribution Conflict

Yes

Index In

U.S. Government Research Reports, Vol. 38, No. 18 p. 41

Index Price

$1.60

Distribution Classification

2

DTIC Record Exists

Yes

Report Availability

Not available via Contrails

Type

report