THE EFFECT OF SURFACES ON THE MECHANICAL BEHAVIOR OF METALS

Abstract

The activation energies for plastic flow of aluminum a copper and gold were found to decrease as functions of the rate of metal removal. The decrease in activation energy was largest for aluminum and smallest for gold. As calculated by the usual methods, the activated volume for aluminum decreases with the polishing rate; however, it is shown that this method of determining the activated volume is incorrect. A study of the metal recovery process showed that it is associated with the ability of dislocations to escape from the crystal and the relaxation of dislocations in the debris layer. The activation energy at low strains for aluminum cryatals is related almost entirely to the debris layer.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1963
Accession Number
AD0401399

Entities

People

  • I. R. Kramer

Organizations

  • Glenn L. Martin Company

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Civil Engineering
  • Creep
  • Crystal Structure
  • Energy
  • Engineering
  • Engineers
  • Heat Of Activation
  • Materials
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanics
  • Metals
  • New York
  • Plastic Flow
  • Polishing
  • Surface Properties

Readers

  • Aerosol Science/Aerosol Physics
  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Materials Science (Mechanical Engineering).