INVESTIGATION OF STRESS-CORROSION CRACKING OF HIGH-STRENGTH ALLOYS

Abstract

Data to date show that the 6Al-4V titanium alloy is immune to stress- corrosion cracking under the test conditions of this program in both the annealed and in the quenched-and-aged conditions. It was found that stress- corrosion cracking occurs in both 18%- and 20%-nickel maraging steels, after short exposure to specific environments. The 20%-nickel variety, if not coldworked, is found to crack in a branching intergranular pattern when exposed to distilled water, salt water, or a high-humidity atmosphere. However, when this same alloy is cold-worked before aging, it appears to become immune to cracking in all three of these environments. The 18%-nickel maraging steel has, to date, been tested only in the cold-worked-and-aged condition. In this condition, the alloy cracks in distilled water and in a high-humidity environment; the cracking pattern suggests possible failure along slipplanes.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1963
Accession Number
AD0296889

Entities

People

  • R. B. Setterlund

Organizations

  • Aerojet Rocketdyne Holdings

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemistry
  • Cold Working
  • Environment
  • Failure Mode And Effect Analysis
  • High Humidity
  • Maraging Steels
  • Materials
  • Materials Testing
  • Mechanical Properties
  • Mechanical Working
  • Salt Water
  • Solid Propellants
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Test Methods
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.