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Titre du document / Document title

The effect of particles on dynamic recrystallization and fabric development of granular ice during creep

Auteur(s) / Author(s)

SONG Min (1) ; BAKER Ian (1) ; COLE David M. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755-8000, ETATS-UNIS
(2) US Army Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, New Hampshire 03755-1290, ETATS-UNIS

Résumé / Abstract

The mechanical behavior and microstructural evolution of laboratory-prepared, particle-free fresh-water ice and ice with 1 wt.% (∼0.43 vol.%) silt-sized particles were investigated under creep with a stress level of 1.45 MPa at -10°C. The particles were present both within the grains and along the grain boundaries. The creep rates of specimens with particles were always higher than those of particle-free ice. Dynamic recrystallization occurred for both sets of specimens, with new grains nucleating along grain boundaries in the early stages of creep. The ice with particles showed a higher nucleation rate. This resulted in a smaller average grain-size for the ice with particles after a given creep strain. Fabric studies indicated that ice with particles showed a more random orientation of c axes after creep to ∼10% strain than the particle-free ice.

Revue / Journal Title

Journal of Glaciology    ISSN  0022-1430   CODEN JOGLAO 

Source / Source

2005, vol. 51, no174, pp. 377-382 [6 page(s) (article)] (34 ref.)

Langue / Language

Anglais

Editeur / Publisher

International Glaciological Society, Cambridge, ROYAUME-UNI  (1947) (Revue)

Mots-clés anglais / English Keywords

textures

;

Grain size

;

recrystallization

;

creep

;

mechanical properties

;

microstructures

;

Interstitial impurities

;

Polycrystal

;

Ice crystals

;

glaciology

;

Mots-clés français / French Keywords

Texture

;

Grosseur grain

;

Recristallisation

;

Fluage

;

Propriété mécanique

;

Microstructure

;

Impureté interstitielle

;

Polycristal

;

Cristal glace

;

Glaciologie

;

Mots-clés espagnols / Spanish Keywords

Textura

;

Grosor grano

;

Recristalización

;

Fluencia

;

Propiedad mecánica

;

Microestructura

;

Impureza intersticial

;

Policristal

;

Cristal hielo

;

Localisation / Location

INIST-CNRS, Cote INIST : 5524, 35400013574141.0050

Nº notice refdoc (ud4) : 17512841



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