Hot-Salt Stress-Corrosion of Titanium Alloys: Generation of Hydrogen and its Embrittling Effect

Abstract

Alloy specimens of Ti-8A1-lMo-lV were salt-coated and exposed to conditions conducive to hot-salt stress-corrosion. Subsequent tensile tests revealed that ductility was strain-rate and temperature sensitive. Embrittlement was more pronounced at slow crosshead speeds in the vicinity of ambient temperature. After salt-exposure ductility was restored by vacuum annealing. Substantial increases in hydrogen content were measured in embrittled specimens. These results demonstrate that hydrogen can be generated during elevated temperature exposure to salt and that the subsequent embrittlement is a manifestation of the phenomenon of "slow-strain-rate" hydrogen embrittlement.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1969
Accession Number
ADA382478

Entities

People

  • Hugh R. Gray

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemistry
  • Compressors
  • Cracks
  • Gas Turbines
  • Heat Treatment
  • Hydrogen Embrittlement
  • Materials
  • Materials Science
  • Mechanical Properties
  • Standards
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Tensile Properties
  • Tensile Strength
  • Tensile Testing
  • Turbines

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.