The influence of prior deformation on hydride precipitation in zircolay
Journal Article
·
· Acta Metallurgica; (United States)
OSTI ID:7116241
- Ontario Hydro, Toronto, ON (Canada). Metallurgical Research Dept.
- Dept. of Materials Science and Engineering, McMaster Univ., Hamilton, Ontario L8S 4M1 (CA)
- Alcan International Ltd., Research and Development Center PBO 8400, Kingston, Ontario K7L 5L9 (CA)
This paper reports on precipitation of hydrides that has been studied in samples of Zircaloy subjected to prior tensile or compressive deformation before charging with hydrogen. The mean residual stress pattern in the alloys prior to charging was assessed by neutron diffraction techniques and provided a rough guide as to the preferred site of hydride nucleation. Heterogeneous hydride nucleation at grain boundaries or twin boundaries was commonly found in samples subjected to 4% prior deformation, while transgranular hydrides were most frequently observed after a prior 1/2% compressive deformation or an annealing. The local stress state at grain boundary facets or twins is thought to be the deciding factor in determining where hydrides nucleate and how hydride stacks form.
- OSTI ID:
- 7116241
- Journal Information:
- Acta Metallurgica; (United States), Journal Name: Acta Metallurgica; (United States) Vol. 40:2; ISSN 0001-6160; ISSN AMETA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
08 HYDROGEN
080800 -- Hydrogen-- Properties & Composition
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALLOYS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DEFORMATION
DIFFRACTION
EMBRITTLEMENT
GRAIN BOUNDARIES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN EMBRITTLEMENT
MICROSTRUCTURE
NEUTRON DIFFRACTION
NUCLEATION
RESIDUAL STRESSES
SCATTERING
STRESSES
ZIRCALOY
ZIRCONIUM ALLOYS
ZIRCONIUM BASE ALLOYS
080800 -- Hydrogen-- Properties & Composition
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALLOYS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DEFORMATION
DIFFRACTION
EMBRITTLEMENT
GRAIN BOUNDARIES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN EMBRITTLEMENT
MICROSTRUCTURE
NEUTRON DIFFRACTION
NUCLEATION
RESIDUAL STRESSES
SCATTERING
STRESSES
ZIRCALOY
ZIRCONIUM ALLOYS
ZIRCONIUM BASE ALLOYS