The correlation between the power-law coefficients in creep: the temperature dependence

Authors
Citation
A. Iost, The correlation between the power-law coefficients in creep: the temperature dependence, J MATER SCI, 33(12), 1998, pp. 3201-3206
Citations number
40
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE
ISSN journal
00222461 → ACNP
Volume
33
Issue
12
Year of publication
1998
Pages
3201 - 3206
Database
ISI
SICI code
0022-2461(19980615)33:12<3201:TCBTPC>2.0.ZU;2-9
Abstract
In this study we investigated the relationship between the coefficients of the Norton law for low-stress high-temperature deformation results of diffe rent materials reported in the literature. These coefficients are interrela ted and it is shown that this relation can be theoretically deduced from th e assumption of a variation of the activation area with the inverse of the effective stress (i.e, a variation of the activation energy with the logari thm of the stress). As a consequence, all the straight lines In(strain-rate )-In (stress) intersected at the same point, named the pivot point. This pi vot point is characteristic of each material. Such a correlation can be fou nd in the field of the mechanics of materials when a power-law relation hol ds. (C) 1998 Kluwer Academic Publishers.