Delayed Hydride Cracking in Zirconium during Heat up and at Low Temperatures

加热和低温过程中锆的延迟氢化物裂解

• 批准号: 370874-2008
• 负责人: Daymond, Mark
• 金额: $ 2.73万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=461089
• 关键词: Delayed; Hydride; Cracking; Zirconium; during

DHC is a thermally activated 'slow-cracking' mechanism, occurring in Zr-2.5Nb CANDU pressure tubes when hydrogen (deuterium) is found above a critical concentration, diffuses to stress concentrations at a crack tip (or other stress concentrater) and precipitates as hydrides. When these brittle hydrides are large enough, they crack, the crack propagates and arrests at the ductile matrix and the process repeats.

DHC是一种热激活的“缓慢开裂”机制，当氢（氘）高于临界浓度时，发生在Zr-2.5Nb CANDU压力管中，扩散到裂纹尖端（或其他应力集中点）的应力集中，并沉淀为氘。 当这些脆性材料足够大时，它们破裂，裂纹扩展并在韧性基体处停止，并且该过程重复。