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Titolo:
THEORY OF IRRADIATION SWELLING IN MATERIALS WITH ELASTIC AND DIFFUSIONAL ANISOTROPY
Autore:
DUBINKO VI;
Indirizzi:
KHARKOV PHYS & TECHNOL INST KHARKOV 310108 UKRAINE
Titolo Testata:
Journal of nuclear materials
, volume: 225, anno: 1995,
pagine: 26 - 32
SICI:
0022-3115(1995)225:<26:TOISIM>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
POINT-DEFECTS; CUBIC METALS; MICROSTRUCTURE; EVOLUTION; ALLOYS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
16
Recensione:
Indirizzi per estratti:
Citazione:
V.I. Dubinko, "THEORY OF IRRADIATION SWELLING IN MATERIALS WITH ELASTIC AND DIFFUSIONAL ANISOTROPY", Journal of nuclear materials, 225, 1995, pp. 26-32

Abstract

New critical quantities for bubble-void transition effects in irradiated materials are derived with account of elastic interaction between cavities, dislocations and point defects in the approximations of a weak elastic and diffusional anisotropy. The elastic anisotropy is shownto result in quadratic (in the gas pressure to shear modulus ratio) corrections to the cavity bias which can substantially increase the critical quantities for highly overpressurized gas bubbles. On the other hand, the diffusional anisotropy difference between point defects (essential in non-cubic metals) can either increase or decrease the critical quantities depending on the distribution of dislocations over crystallographic directions. In contrast to previous theories, the present one gives not only the onset of bias-driven void swelling but the corresponding mean cavity parameters as well. The maximum void density andthe corresponding swelling rate in the post-transient regime are argued to be determined only by the mean dislocation density and material constants. The relationships among material constants are found by which the stabilization of gas bubbles occurs via the dislocation loop punching mechanism even at elevated temperatures.

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Documento generato il 07/07/20 alle ore 20:51:47