Accession Number : AD0681041

Title :   THE DEFORMATION OF PLASTICALLY NON-HOMOGENEOUS MATERIALS.

Descriptive Note : Final technical rept.,

Corporate Author : HARVARD UNIV CAMBRIDGE MASS DIV OF ENGINEERING AND APPLIED PHYSICS

Personal Author(s) : Ashby,M. F.

Report Date : DEC 1968

Pagination or Media Count : 78

Abstract : Many two-phase alloys work harden much faster than do pure single crystals. Such alloys are 'plastically non-homogeneous', because gradients of plastic deformation are imposed by the microstructure; dislocations are stored in them to accommodate the deformation gradients, and so allow compatible deformation of the two phases. With the exception of single-phase single crystals, almost all metals and alloys are plastically non-homogeneous. The results of this research indicate that more attention should be given to the non-uniform aspects of plastic deformation, and that a plasticity theory based on dislocation mechanics can be constructed for certain such alloys.

Descriptors :   (*COLD WORKING, DISLOCATIONS), HARDENING, CRYSTAL STRUCTURE, DEFORMATION, PLASTIC PROPERTIES, ELECTRON MICROSCOPY, FRACTOGRAPHY, CRACK PROPAGATION, STRESSES, STRAIN(MECHANICS), MICROSTRUCTURE, GRAIN STRUCTURES(METALLURGY)

Subject Categories : Properties of Metals and Alloys
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE