LOW-STRESS CREEP-BEHAVIOR - AN EXAMINATION OF NABARRO-HERRING AND HARPER-DORN CREEP

Authors
OWEN DM LANGDON TG
Citation
Dm. Owen et Tg. Langdon, LOW-STRESS CREEP-BEHAVIOR - AN EXAMINATION OF NABARRO-HERRING AND HARPER-DORN CREEP, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 216(1-2), 1996, pp. 20-29
Citations number
86
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
216
Issue
1-2
Year of publication
1996
Pages
20 - 29
Database
ISI
SICI code
0921-5093(1996)216:1-2<20:LC-AEO>2.0.ZU;2-E
Abstract
Under creep conditions of high homologous temperatures and low stresse s, crystalline solids exhibit Newtonian viscous flow so that the stead y-slate strain rates vary linearly with the applied stress and deforma tion occurs by the Nabarro-Herring and/or Harper-Dorn mechanisms. The characteristics of these two processes are examined with reference to apparent discrepancies in the interpretation of experimental data. Thr ee basic requirements are formulated which, if satisfied, will permit an unambiguous identification of the occurrence of Harper-Dorn creep.