Effect of Rare Earth Additions on Hydrogen Embrittlement Cracking in 4340 Steel.

Abstract

The effect of a 0.2 weight percent cerium addition on the hydrogen embrittlement cracking resistance of AISI 4340 steel was investigated at yield strength levels of approximately 210 and 185 ksi (1450 and 1280 MPa). Sustained-load delayed failure data for precracked compact tension specimens electrolytically charged with hydrogen and plated with cadmium exhibited considerable scatter which was attributed to (1) a loss of hydrogen from the specimens during the storage period between cadmium plating and testing and (2) a nonuniform distribution of cerium in the rare earth modified steel.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1978
Accession Number
ADA061501

Entities

People

  • A. A. Sheinker

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Cerium
  • Chemistry
  • Cracks
  • Current Density
  • Ferrium
  • Heat Treatment
  • Hydrogen Embrittlement
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Military Research
  • Rare Earth Elements
  • Sodium Compounds
  • Stress Corrosion Cracking
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Surface Engineering/Surface Coating Technology.