DISLOCATION DYNAMICS AND THE DEFORMATION OF ALPHA-BRASS.

Abstract

Plastic deformation has been studied in a series of four compositions of alpha-brasses. Experiments were disigned to test the consistency of several indirect methods of determining the dislocation velocity-stress exponent, m*. Plastic zone propagation has been studies for the first time in f.c.c. materials and explained in terms of dislocation dynamics. The concept of activation area has been restricted to low temperature deformation. The applicability of this concept to high temperature deformation has been established. The activation areas for creep deformation have been calculated and examined in the light of many material and deformation variables. The activation areas for grain boundary sliding in Al, Pb, Sn, Zn, and Cu are compared with those for creep in the same materials. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1970
Accession Number
AD0708903

Entities

People

  • Narayana Balasubramanian

Organizations

  • Columbia University

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Consistency
  • Creep
  • Dislocations
  • Dynamics
  • Grain Boundaries
  • High Temperature
  • Low Temperature
  • Materials
  • Physical Properties
  • Plastic Deformation

Readers

  • Materials Science and Engineering.
  • Systems Analysis and Design