Accession Number : AD0690575

Title :   THE EFFECT OF HIGH STRAIN RATES ON THE FLOW STRESS AND DEFECT STRUCTURE OF METALS.

Descriptive Note : Final technical rept.,

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OHIO COLUMBUS LABS

Personal Author(s) : Boyd,J. D. ; Hahn,G. T. ; Rosenfield,A. R.

Report Date : 24 JUN 1969

Pagination or Media Count : 6

Abstract : The objective of this program has been to elucidate the fundamental mechanisms of high-rate plastic deformation of metals. Single crystal specimens of an fcc metal (Cu) and a bcc metal (Nb) were deformed; the macroscopic yielding behavior was noted for each material as a function of strain rate, and the structures of the deformed crystals were studied by metallographic techniques. In addition to the single-crystal work, a study was made of the character of slip bands in polycrystalline iron and a mild steel as a function of temperature. This permitted comparisons to be made between the behavior of different bcc metals. (Author)

Descriptors :   (*METALS, DEFORMATION), SINGLE CRYSTALS, COPPER, NIOBIUM, STEEL, IRON, CRYSTAL DEFECTS, STRAIN(MECHANICS), STRESSES, TENSILE PROPERTIES, MICROSCOPY

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE