Accession Number : AD0281935

Title :   THE EFFECT OF SURFACE-ACTIVE AGENTS ON THE MECHANICAL PROPERTIES OF METALS. PART I. THE EFFECT OF SURFACE-REMOVAL ON THE PLASTIC BEHAVIOR OF ALUMINUM SINGLE CRYSTALS.

Descriptive Note : Rept. for Jan 60-Jan 61

Corporate Author : MARTIN CO BALTIMORE MD

Personal Author(s) : Kramer,I. R.

Report Date : APR 1961

Pagination or Media Count : 29

Abstract : Aluminum single crystals were pulled in an electrolytic cell and the surface of the crystal was removed during the deformation. The extent of Stages I and II (of the deformation process) was increased and their slopes decreased as the rate of metal removed from the surface was increased. Increasing the strain rate caused a decrease in the extent of Stages I and II and increased the slopes. The experimental data indicate that the work-hardening coefficient of Stage I is determined primarily by the conditions which exist on the surface of the crystal. In Stages II and III, both surface effects and internal barriers are important. (Author)

Descriptors :   *ALUMINUM, *SINGLE CRYSTALS, CLEANING, CREEP, CRYSTAL DEFECTS, CRYSTAL LATTICES, DEFORMATION, PLASTIC PROPERTIES, SHEAR STRESSES, STRESSES, SURFACE PROPERTIES, SURFACES

Distribution Statement : APPROVED FOR PUBLIC RELEASE