Mechanical Properties of Metal Hydrides.

Abstract

The role of metal hydrides in the hydrogen embrittlement of a number of metal-hydrogen systems is reviewed. The stress induced formation and cleavage of hydrides at crack tips and the thermodynamics of the hydrides in the stress field of the crack tip are discussed. The mechanical response of the hydrides to applied stresses is described. Many of the hydrides exhibit some plastic deformation under favorable stress systems with the amount of this deformation increasing as the temperature of testing is increased. Phonon properties and the elastic moduli of the hydrides are briefly discussed and it is suggested that these parameters do not provide a basis for understanding the mechanical properties of the hybrides. The deformation response of the hydrides is consistent with the expected behavior of dislocations in the ordered hydride structures. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1984
Accession Number
ADA141496

Entities

People

  • Howard K. Birnbaum

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Bulk Modulus
  • Crack Tips
  • Engineering
  • Free Energy
  • Hydrogen Embrittlement
  • Materials
  • Mechanical Properties
  • Metallurgy
  • Military Research
  • Phase Transformations
  • Plastic Deformation
  • Plastic Properties
  • Solid Solutions
  • Stress Concentration
  • Tensile Stress
  • Transitions

Readers

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