Initiation of delayed hydride cracking in zirconium-2.5 niobium.
| dc.contributor.advisor | Coleman, C. E., | |
| dc.contributor.author | Rodgers, Douglas Keith. | |
| dc.date.accessioned | 2009-03-23T15:57:08Z | |
| dc.date.available | 2009-03-23T15:57:08Z | |
| dc.date.created | 1992 | |
| dc.date.issued | 1992 | |
| dc.degree.level | Masters | |
| dc.degree.name | M.Sc.A. | |
| dc.description.abstract | Delayed Hydride Cracking (DHC) occurs in Zr-2.5Nb when certain requirements are met. The mechanism of DHC consists of diffusion of hydrogen to a stress concentrator, such as a crack-tip, precipitation then fracture of a hydride at the crack-tip, and repetition of the process; the crack advances in steps. Incubation times, to the start of cracking and crack-tip hydride morphologies have been measured in pre-cracked cantilever beam specimens tested at applied K$\rm\sb I$'s up to 20 MPam$\sp{1/2}$ and temperatures ranging from 100 to 250$\sp\circ$C. The incubation time for DHC was found to vary inversely with DHC velocity. Contrary to previous research, the incubation time is highly variable, even for a given temperature and applied K$\rm\sb I,$ and the crack-tip hydride morphology is much more complicated than the simple model of a single hydride at a crack-tip. | |
| dc.format.extent | 159 p. | |
| dc.identifier.citation | Source: Masters Abstracts International, Volume: 33-04, page: 1328. | |
| dc.identifier.isbn | 9780315936089 | |
| dc.identifier.uri | http://hdl.handle.net/10393/7494 | |
| dc.identifier.uri | http://dx.doi.org/10.20381/ruor-15370 | |
| dc.publisher | University of Ottawa (Canada) | |
| dc.subject.classification | Engineering, Mechanical. | |
| dc.title | Initiation of delayed hydride cracking in zirconium-2.5 niobium. | |
| dc.type | Thesis |
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