Annealing Stages in Explosively Deformed Copper

Item

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