Deformation-Mechanism Maps and the Creep of Tungsten Lamp Filaments

Abstract

A crystalline solid can deform plastically in a number of ways. Deformation mechanism diagrams can be constructed which display the fields of stress and temperature in which a given mechanism is dominant, and the strain rate it yields. This report describes some refinements in the computation of the diagrams, and illustrates their use by means of a case-study: the creep of tungsten lamp filaments.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1972
Accession Number
AD0755230

Entities

People

  • H. J. Frost
  • M. F. Ashby

Organizations

  • Harvard University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Creep
  • Crystal Lattices
  • Crystal Structure
  • Diffusion Coefficient
  • Engineering
  • Equations
  • Grain Boundaries
  • Grain Size
  • High Temperature
  • Low Temperature
  • Materials
  • Mechanics
  • Shear Modulus
  • Shear Stresses
  • Steady State
  • Stresses

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Optical Physics and Photonics.
  • Systems Analysis and Design