In-situ creep law determination for modeling Spark Plasma Sintering of TiAl 48-2-2 powder - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Intermetallics Année : 2017

In-situ creep law determination for modeling Spark Plasma Sintering of TiAl 48-2-2 powder

(1, 2) , (2) , (1, 2) , (3) , (1) , (1) , (2)
1
2
3

Résumé

Spark Plasma Sintering (SPS) is a process which allows powder densification, applying simultaneously a uniaxial external load and pulsed direct current of very high intensity through tools. This process is attracting significant attention, with a tremendous increase of studies in the metal powder densification field. Its growing popularity lies in the very fast heating rate and short cycle time driven by the Joule effect, which limits grain growth. However, this process implements different coupled electrical, thermal and mechanical phenomena. All this makes the process difficult to develop and to apply for routine industrial production, which has motivated the development of numerical simulation tools in order to understand and optimize the process. Up to now, very few models integrating the coupling between heat generation, electric transfer and mechanics have been proposed. In particular, a numerical predictive model for powder densification requires a good understanding of the mechanical behavior, in our case a viscoplastic compressive law (Abouaf mechanical model). In this article, we will discuss the characterization of the material during densification, focusing on the creep behaviors of dense and porous state materials used to simulate sintering in the Abouaf framework. Validations of the creep law parameters and also of the densification parameters will be presented and subsequently discussed.
Fichier principal
Vignette du fichier
Martins-et-al Intermetallics2017 av.pdf (945.24 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01509753 , version 1 (15-06-2018)

Identifiants

Citer

David Martins, Fanny Grumbach, Charles Manière, Pierre Sallot, Katia Mocellin, et al.. In-situ creep law determination for modeling Spark Plasma Sintering of TiAl 48-2-2 powder. Intermetallics, 2017, 86, pp.147 - 155. ⟨10.1016/j.intermet.2017.03.006⟩. ⟨hal-01509753⟩
354 Consultations
389 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More