Effect of specimen pre-cracking method on Delayed Hydride Cracking Rate

Crack propagation rate by the process known as Delayed Hydride Cracking (DHC) is usually assessed in pressure tube materials. Curved Compact Toughness specimens are fatigue pre-cracked previous to DHC test. This work explores the validity of specimen pre-cracking by the same DHC process. It was demo...

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Veröffentlicht in:	Journal of nuclear materials 2012, Vol.420 (1), p.273-277
Hauptverfasser:	Mieza, J.I., De Las Heras, E., Arias, M.I., Domizzi, G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Controled nuclear fusion plants Crack propagation Cracks Energy Energy. Thermal use of fuels Exact sciences and technology Fatigue (materials) Fatigue cracking Fatigue tests Fission nuclear power plants Fracture mechanics Fuels Hydrides Installations for energy generation and conversion: thermal and electrical energy Nuclear fuels Tubes
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Beschreibung
Zusammenfassung:	Crack propagation rate by the process known as Delayed Hydride Cracking (DHC) is usually assessed in pressure tube materials. Curved Compact Toughness specimens are fatigue pre-cracked previous to DHC test. This work explores the validity of specimen pre-cracking by the same DHC process. It was demonstrated that crack velocity is not affected by the pre-cracking method. Results are compared with values obtained by using not pre-cracked specimens.
ISSN:	0022-3115 1873-4820
DOI:	10.1016/j.jnucmat.2011.10.007