Accession Number : AD0282025

Title :   ANELASTICITY CAUSED BY DEBRIS DIPOLES IN PLASTICALLY STRAINED CRYSTALS,

Corporate Author : BROWN UNIV PROVIDENCE R I

Personal Author(s) : Gilman,J. J.

Report Date : JUL 1962

Pagination or Media Count : 10

Abstract : AS screw dislocations move through crystals they leave numerous edge dislocation dipoles in their wakes. This debris was observed in a broad variety of crystals including LiF; MgO; NaC1; Si; Fe; Zn; and Al. It plays an important role in strain-hardening; deformation band formation; steady-state creep; and probably in fatigue and other fracture processes. Here it will be argued that it also may account for the low-temperature internal friction peaks that appear following the plastic deformation of crystals. (Author)

Descriptors :   (*METAL CRYSTALS, *DIPOLE MOMENTS), METALLURGY, ELASTIC PROPERTIES, FATIGUE(MECHANICS), HARDENING, FRACTURE(MECHANICS), CREEP, DEFORMATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE