INSTABILITY OF TITANIUM AND TI/6AL/4V ALLOY AT ROOM TEMPERATURE

Abstract

Titanium and Ti/6Al/4V under torsion exhibit unusual instability which shows itself as (a) abnormally prolonged creep on yielding, (b) ineffective strain-hardening after yielding, and (c) deviations from elastic strain at loads above a limit of proportionality which is low compared with the bulk yield stress. As a result of this inherent instability it is possible to produce significant axial extensions under low tensile stresses combined with small-amplitude cyclic torsion; and to reduce the nominal bulk yield stress in torsion to at least half its nominal value by suitable prior straining.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1967
Accession Number
AD0652574

Entities

People

  • W. A. Wood

Organizations

  • Columbia University

Tags

DTIC Thesaurus Topics

  • Acoustic Waves
  • Amplitude
  • Civil Engineering
  • Creep
  • Crystal Structure
  • Elastic Properties
  • Engineering
  • Hardening
  • Instability
  • Materials Laboratories
  • Mechanics
  • Metals
  • Strain Hardening
  • Stresses
  • Titanium
  • United States Government
  • Yield Strength

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Mechanical Engineering/Mechanics of Materials.