THE MICROSTRAIN REGION IN HIGH PURITY REFRACTORY METALS.

Abstract

Dislocation velocity measurements at room temperature on molybdenum single crystals by the etch-pitting method are described. It is shown that the stress dependence of the dislocation velocity obeys the relationship v = (tan/tan sub o) to the mth power with m about 6.4 and tan sub o about 5.5 Kg mm to the minus 2nd power. It is also shown that this relationship can be derived directly from thermal activation theory and that the results support the thermally activated overcoming of the Peierls hills as the rate controlling process in the plastic deformation of molybdenum. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 30, 1966
Accession Number
AD0645213

Entities

People

  • Alan Lawłey
  • Hans Conrad
  • Heinrich L. Prekel

Organizations

  • Franklin Institute

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Crystals
  • Dislocations
  • Elements
  • Measurement
  • Metals
  • Molybdenum
  • Plastic Deformation
  • Refractory Metals
  • Single Crystals

Readers

  • Approximation Theory.
  • Materials Science and Engineering.