Advances in the theory of delayed hydride cracking in zirconium alloys

San-Qiang Shi, Manfred P. Puls

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

12 Citations (Scopus)

Abstract

Recent theoretical advances in understanding the phenomena of delayed hydride cracking (DHC) in structural materials such as zirconium alloys used in nuclear reactors are reviewed. The criteria for the initiation of DHC are established in terms of the thermodynamics of hydride formation, the micromechanics of hydride fracture, and the diffusion-controlled growth of a hydride at a flaw tip. Theoretical models for the critical hydride size for DHC initiation, threshold stress intensity factor at a sharp crack (or threshold maximum notch-tip stress at a blunt notch), diffusion-limited maximum hydride length, hydride thickness at a flaw, and DHC initiation and arrest temperatures during temperature transients are examined and compared to experimental observations. In the area of DHC propagation, computer simulation methods for the time-dependent hydride growth and fracture at a flaw have been developed and applied to study the effects on DHC velocity of temperature (and/or load) transients, mechanical properties of the hydride and matrix materials, hydrogen content and stress state.
Original languageEnglish
Title of host publicationHydrogen Effects in Materials
PublisherMinerals, Metals & Materials Soc (TMS)
Pages611-621
Number of pages11
Publication statusPublished - 1 Jan 1996
Externally publishedYes
EventProceedings of the 1994 5th International Conference on the Effect of Hydrogen on the Behavior of Materials - Moran, WY, United States
Duration: 11 Sep 199414 Sep 1994

Conference

ConferenceProceedings of the 1994 5th International Conference on the Effect of Hydrogen on the Behavior of Materials
CountryUnited States
CityMoran, WY
Period11/09/9414/09/94

ASJC Scopus subject areas

  • Engineering(all)

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