Twinning engineering of high-entropy alloys: An exercise in process optimization and modeling - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Materials Science and Engineering: A Année : 2021

Twinning engineering of high-entropy alloys: An exercise in process optimization and modeling

Résumé

In a bid to improve the mechanical properties of high-entropy alloys, particularly, their strain hardening capability, we adapted the time-proven concept of ‘twinning engineering’, developed in the context of TWIP steels, to twinning-assisted high-entropy materials. The strategy chosen involved a two-step thermomechanical processing that consisted of low-temperature pre-straining and subsequent annealing. This approach was trialled on CoCrFeMnNi as an exemplary high-entropy alloy. The annealing conditions selected ensured that the deformation twins generated under low-temperature deformation were retained, whilst the dislocation density was recovered. The viability of this strategy was convincingly confirmed for room temperature deformation of the alloy. A constitutive model accounting for the effect of the pre-straining induced deformation twins was proposed. It was shown to provide a reliable description of the low-temperature and room-temperature deformation behavior of CoCrFeMnNi when deformation twins are involved.
Fichier principal
Vignette du fichier
S0921509321009497.pdf (1.64 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03420392 , version 1 (02-08-2023)

Licence

Identifiants

Citer

Jongun Moon, Olivier Bouaziz, Hyoung Seop Kim, Yuri Estrin. Twinning engineering of high-entropy alloys: An exercise in process optimization and modeling. Materials Science and Engineering: A, 2021, 822, pp.141681. ⟨10.1016/j.msea.2021.141681⟩. ⟨hal-03420392⟩
39 Consultations
18 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More