Ion microprobe analysis for niobium hydride in hydrogen embrittled niobium. Technical report

Technical Report · Tue Apr 01 04:00:00 EDT 1975

OSTI ID:7330823

Birnbaum, H K; Grossbeck, M L; Williams, P; Evans, Jr, C A

Hydrogen embrittled niobium samples have been examined in an ion microprobe to verify the mechanism of embrittlement by stress induced precipitation of hydride. A fractured Nb-2 at.% H sample was examined in detail. Mass analyzed images of the fracture region of the sample were obtained using Nb((), NbH((), H((), and NbO(() ions. The images clearly demonstrate the presence of a hydrogen-rich phase at the fracture site. NbH(()/Nb(() ratios at the fracture site and away from it appear characteristic of niobium hydride and Nb-H solid solution respectively. Scanning electron microscope and electron diffraction studies together with the ion microprobe analysis provide strong evidence in support of the theory of hydrogen embrittlement by stress-induced precipitation of niobium hydride.

• Research Organization: Illinois Univ., Urbana (USA). Dept. of Metallurgy and Mining Engineering
• OSTI ID: 7330823
• Report Number(s): AD-A-010548
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
CHEMICAL ANALYSIS
COHERENT SCATTERING
CORROSIVE EFFECTS
CRYOGENIC FLUIDS
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
EMBRITTLEMENT
FAILURES
FLUIDS
FRACTURES
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
ION MICROPROBE ANALYSIS
METALS
MICROSCOPY
NIOBIUM
NIOBIUM COMPOUNDS
NIOBIUM HYDRIDES
NONDESTRUCTIVE ANALYSIS
NONMETALS
REFRACTORY METALS
SCATTERING
STRESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS