Dislocation studies on deformed single crystals of high-purity iron using positron annihilation: Determination of dislocation densities

Journal Article · Tue Jul 15 04:00:00 EDT 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.34.823· OSTI ID:5661118

Park, Y; Waber, J T; Meshii, M; Snead, Jr, C L; Park, C G

A new method for determining the total number of dislocations per unit area, as well as the fraction of screw and edge components, is presented. Single-crystal specimens which have been (a) bent over a mandrel, (b) cold rolled at room temperature, and (c) deformed in tension at 200 K have been studied. Etch pits were studied in connection with this work and were found to be primarily of the <111> type. The density of emergent dislocations as determined by the etch pits was found to be smaller than the number determined by the positron-annihilation technique.

• Research Organization: Department of Material Science and Engineering, Northwestern University, Evanston, Illinois 60201
• OSTI ID: 5661118
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 34:2; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals &amp; Alloys-- Physical Properties
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
DEFORMATION
DENSITY
DISLOCATIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
INTERACTIONS
IRON
LEPTONS
LIFETIME
LINE DEFECTS
METALS
MONOCRYSTALS
PHYSICAL PROPERTIES
POSITRONS
TRANSITION ELEMENTS