DELAYED FRACTURE OF ALUMINUM ALLOYS BY LIQUID ZINC AMALGAM

Abstract

Delayed fracture studies were conducted on sheet specimens of aluminum alloys 2024 and 7075 in different conditions of temper upon wetting with a liquid 2% zinc amalgam. Delayed fracture data obtained at ambient temperature showed behavior characteristic of this type phenomenon in that the time to failure under sustained load varied inversely to the magnitude of applied stress. Tests on alloys 2024 and 7075 in the precipitation hardened condition revealed that embrittlement could occur rapidly at stress levels below the yield strength of the material while similar tests on these alloys in the annealed state showed that brittle fracture could not be induced at sub- yield stress levels regardless of time held at stress.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1963
Accession Number
AD0406446

Entities

People

  • B. J. Rogus

Organizations

  • Frankford Arsenal

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum
  • Aluminum Alloys
  • Boundaries
  • Energy
  • Engineering
  • Hydrogen Embrittlement
  • Liquid Metals
  • Materials
  • Mechanical Properties
  • Military Research
  • Munitions
  • Navy
  • New Jersey
  • Stresses
  • Tensile Properties
  • Tensile Strength
  • Yield Strength

Readers

  • Battery Technology and Engineering
  • Materials Science (Mechanical Engineering).