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

Martins, David and Grumbach, Fanny and Manière, Charles and Sallot, Pierre and Mocellin, Katia and Bellet, Michel and Estournès, Claude In-situ creep law determination for modeling Spark Plasma Sintering of TiAl 48-2-2 powder. (2017) Intermetallics, 86. 147-155. ISSN 0966-9795

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Official URL: http://dx.doi.org/10.1016/j.intermet.2017.03.006

Abstract

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.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The original PDF of the article can be found at : http://www.sciencedirect.com/science/article/pii/S096697951630749X
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Mines ParisTech (FRANCE)
Other partners > SAFRAN (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:13 Jun 2017 09:33

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