Delayed-elastic model for initiation and accumulation of creep cavitation at high temperatures

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ConferenceAdvances in Fracture Research, Proceedings of the 6th International Conference on Fracture (ICF6): 04 December 1984, New Delhi, India
Pages22952302; # of pages: 8
Subjectcreep; high degree; crackings (breaking); model tests; high temperature creep; intergranular fracture; cavity nucleation; incubation time; creep damage; damage accumulation; delayed elasticity; polycrystals; grain-boundary sliding; grain size; ice
AbstractA quantitative model has been developed for stress dependency of the incubation time required for initiation of intergranular cracks under moderate stress during high- temperature creep, the minimum stress required, and the subsequent accumulation of damage from cracking activity. It is based on a combination of theory and observation: cracks form at a critical delayed-elastic strain corresponding to a critical grain-boundary sliding displacement, and further creep cavitation increases exponentially with delayed-elastic strain in excess of this critical value.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number24208
NPARC number20375436
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Record identifierd8eef700-af3c-46f4-b7aa-d606b7c2df54
Record created2012-07-23
Record modified2016-05-09
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