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, n
o186, pp. 533-537 [5 page(s) (article)] (1/2 p.)
Langue / Language
Anglais
Editeur / Publisher
International Glaciological Society, Cambridge, ROYAUME-UNI
(1947)
(Revue)
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Localisation / Location
INIST-CNRS, Cote INIST : 5524, 35400019646679.0160
Nº notice refdoc (ud4) : 20562368
