STRAIN AGING AND DELAYED FAILURE IN HIGH-STRENGTH STEELS

Abstract

Spontaneous strain aging which occurs during tensile testing was examined for several high-strength steels. The results of smooth and notch tensile tests indicated that significant strain aging effects occurred in most high-strength steels in the 300 F to 800 F temperature range and this behavior was analogous to "%blue brittleness" in mild steels. Constant load, stress rupture tests were conducted on the steels to determine the possible relationship between strain-aging embrittlement and delayed failure. Or'2y the 300 M steel tested at 400 F exhibited an appreciable degree of delayed failure. This embrittlement, was extremely sensitive to test environment and was elimiriated when tests were conducted in argon. Although strain aging was not a sufficient condition to initiate delayed failure, it appeared to increase the severity of the environmental effects in the particular range where sufficient interstitial mobility existed.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1962
Accession Number
AD0294396

Entities

People

  • E. A. Steigerwald
  • G. L. Hanna

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Corrosion
  • Dispersion Hardening
  • Equations
  • Failure Mode And Effect Analysis
  • Ferrium
  • Hardening
  • Heat Treatment
  • Internal Friction
  • Materials
  • Mechanical Properties
  • Mechanics
  • Stainless Steel
  • Stress Corrosion
  • Tensile Properties
  • Tensile Strength
  • Tensile Testing

Readers

  • Materials Science and Engineering.
  • Metallurgy