Accession Number : ADA141496

Title :   Mechanical Properties of Metal Hydrides.

Descriptive Note : Technical rept.,

Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF METALLURGY AND MINING ENGINEERING

Personal Author(s) : Birnbaum,H K

PDF Url : ADA141496

Report Date : Apr 1984

Pagination or Media Count : 23

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)

Descriptors :   *Intermetallic compounds, *Metal compounds, *Hydrides, *Hydrogen embrittlement, Stresses, Cracks, Plastic Deformation, Modulus of elasticity, Phonons, Dislocations, Thermodynamics, Niobium, Zirconium, Titanium

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE