Accession Number : AD0738598

Title :   Point Defects in Cyclicly Deformed Metals.

Descriptive Note : Final rept. 1 Nov 68-31 Dec 71,

Corporate Author : WASHINGTON UNIV SEATTLE

Personal Author(s) : Dawson,H. I.

Report Date : 1972

Pagination or Media Count : 27

Abstract : The research is aimed at contributing to the understanding of how lattice defects, in particular point defects and their interactions, are associated with the early stages of cyclic deformation of fcc metals. Defect production and defect interactions have been studied as a function of the number of deformation cycles of constant stress or constant strain amplitude. Residual electrical resistivity measurements have been made to monitor the defect production and the subsequent recovery. Modulus measurements have been used in an attempt to identify interactions involving dislocations, and mechanical test have been performed to study cyclic stress-strain behavior. (Author)

Descriptors :   (*METAL CRYSTALS, DEFORMATION), DISLOCATIONS, CRYSTAL DEFECTS, STRESSES, STRAIN(MECHANICS), INTERACTIONS, ELECTRICAL RESISTANCE, GOLD, ALUMINUM, CRYOGENICS

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE