Indentation creep vs. indentation relaxation: A matter of strain rate definition? - Mines Saint-Étienne Accéder directement au contenu
Article Dans Une Revue Materials Science and Engineering: A Année : 2020

Indentation creep vs. indentation relaxation: A matter of strain rate definition?

Résumé

An extensive study of the different methods able to measure material creep properties in indentation is proposed. A systematic comparison of the fast creep, long-term creep, constant strain rate and long-term relaxation tests is performed on amorphous selenium. Even though measured apparent activation energy and strain rate sensitivities are very similar for all tests, a discrepancy is highlighted between the creep/constant strain rate tests and the relaxation tests. This effect seems to be related to the strain rate definition which should be a function of the strain rate sensitivity m. In this paper, it is proposed to use a representative strain rate ϵ̇r as proposed by Kermouche et al. (2008). An excellent agreement is found between all the methods, including uniaxial compression when expressing the creep behavior as a function of representative stress and strain rate.

Domaines

Matériaux
Fichier principal
Vignette du fichier
PB Materials Sc Engineering A.pdf (1.21 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

emse-04511474 , version 1 (19-03-2024)

Identifiants

Citer

Paul Baral, Guillaume Kermouche, Gaylord Guillonneau, Gabrielle Tiphéne, Jean-Michel Bergheau, et al.. Indentation creep vs. indentation relaxation: A matter of strain rate definition?. Materials Science and Engineering: A, 2020, 781, pp.139246. ⟨10.1016/j.msea.2020.139246⟩. ⟨emse-04511474⟩
35 Consultations
13 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More