Mechanical characterization of zirconium hydrides with high energy X-ray diffraction | Posted on:2010-08-11 | Degree:Ph.D | Type:Dissertation | University:Queen's University (Canada) | Candidate:Kerr, Matthew | Full Text:PDF | GTID:1441390002484382 | Subject:Engineering | Abstract/Summary: | | Zirconium and its alloys are of technical importance, finding application as a structural material in the nuclear industry. Engineering components fabricated from zirconium slowly pick-up hydrogen as a result of in-reactor corrosion, degrading the components mechanical properties as a brittle hydride phase forms. This dissertation applies high energy X-ray diffraction to directly measure the mechanical properties of zirconium hydrides in the bulk and at stress concentrations in zirconium alloys. The current study is presented as a manuscript format dissertation comprised of three manuscript chapters. Chapter 3 reports the in-situ loading of hydrided Zircaloy-2 and discusses hydride/Zircaloy-2 matrix interactions as a function of applied load. Chapter 4 reports the mechanical behavior at a fatigue pre-crack in un-hydrided Zircaloy-2, comparing the results to finite element and polycrystalline plasticity models of the crack tip. Chapter 5 reports the effect of hydrides on the notch tip strain field. The three manuscript chapters are followed by a general discussion in Chapter 6 and conclusions in Chapter 7. | Keywords/Search Tags: | Zirconium, Mechanical, Chapter, Hydrides | | Related items |
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