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Titre du document / Document title

The effect of particles on creep rate and microstructures of granular ice

Auteur(s) / Author(s)

SONG Min (1) ; BAKER Ian (2) ; COLE David M. (3) ;

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

(1) State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, CHINE
(2) Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755-8000, ETATS-UNIS
(3) US Army Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, New Hampshire 03755-1290, ETATS-UNIS

Résumé / Abstract

The microstructures of particle-free granular freshwater ice and ice containing 1 wt.% of 50±10 μm uniformly distributed particles were investigated before and after compressive creep to ∼10% strain with stresses of 1.45 MPa at -10°C and 0.4 MPa at -5°C. Creep rates of particle-containing ice were always higher than those of particle-free ice. For an initial stress of 1.45 MPa at -10°C, dynamic recrystallization occurred with new grains nucleating and growing along grain boundaries for both sets of specimens, and the ice with particles showed a higher nucleation rate. Under creep with an initial stress of 0.4 MPa at -5°C, dynamic recrystallization also occurred by the nucleation and growth of new grains along the grain boundaries for ice containing particles, but recrystallization in the particle-free ice occurred through grain boundary migration.

Revue / Journal Title

Journal of Glaciology    ISSN  0022-1430   CODEN JOGLAO 

Source / Source

2008, vol. 54, no186, pp. 533-537 [5 page(s) (article)] (1/2 p.)

Langue / Language

Anglais

Editeur / Publisher

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

Mots-clés anglais / English Keywords

Grain boundary migration

;

Solid inclusion

;

Impurity effect

;

creep

;

Compressive stress

;

recrystallization

;

microstructures

;

Polycrystalline ice

;

glaciology

;

Mots-clés français / French Keywords

Migration joint grain

;

Inclusion solide

;

Effet impureté

;

Fluage

;

Contrainte compression

;

Recristallisation

;

Microstructure

;

Glace polycristalline

;

Glaciologie

;

Mots-clés espagnols / Spanish Keywords

Migración limite grano

;

Inclusión sólida

;

Efecto impureza

;

Fluencia

;

Tensión compresión

;

Recristalización

;

Microestructura

;

Hielo policristalino

;

Localisation / Location

INIST-CNRS, Cote INIST : 5524, 35400019646679.0160

Nº notice refdoc (ud4) : 20562368



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