An experimental investigation of strain relaxation in ice

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AuthorSearch for:
TypeArticle
Journal titleScripta Metallurgica
ISSN0036-8687
Volume2
Issue11
Pages615619; # of pages: 5
Subjectice; strain; dislocation
AbstractUsing columnar-grained ice specimens, a study was done of the reverse plastic deformation (strain relaxation) which occurs after removal of applied stress. The specimens had been deformed in creep at a temperature of -9 degrees C. They were then left for as long as required to resume their original shape. The results of the experiment were analysed using an equation based on the rate theory of dislocation mobility. The activation volume determining the rate of the phenomenon was as follows: 0.35 X 10[3]b[3] is less than or equal to V[f] is less than or equal to 1 X 10[3]b[3] where b is the Burgers vector. The author concludes from this that neither cross-slip nor climb would have any more than a negligible effect on the ice deformation and that the process is controlled by the Peierls barrier mechanism or by the nonconservative motion of jogs. The author also evaluates the significance of intersection phenomena.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierDBR-RP-387
NRC number10522
2513
NPARC number20374722
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Record identifier3730a1d3-d2c8-4ff7-aa7a-826d8615c60f
Record created2012-07-23
Record modified2016-05-09
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