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In-situ Experiments to Determine the Creep Law Describing the SPS Densification of a TiAl Powder

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Résumé

Spark Plasma Sintering (SPS) is a process belonging to the powder metallurgy family. It consists in applying simultaneously a load and a high intensity pulsed direct current on graphite tools containing powder to sinter this latter. The originality of this study lies on the in-situ SPS compression creep tests performed on TiAl 48-2-2 dense and porous samples, completed by SPS powder densification to established the creep law of this material. Once determined, it is then used in a fully-coupled simulation tool to predict temperature field and density gradient within the samples. The experimental relative density map will be presented and the correlation with the numerical model will be analyzed, both on simple and complex shape specimens. The evolution of the microstructure during creep test as well as after densification of a complex part will be presented and correlation with numerically assessed temperature field will be discussed.
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Dates et versions

hal-01708459 , version 1 (13-02-2018)

Identifiants

  • HAL Id : hal-01708459 , version 1

Citer

David Martins, Fanny Grumbach, Charles Manière, Pierre Sallot, Michel Bellet, et al.. In-situ Experiments to Determine the Creep Law Describing the SPS Densification of a TiAl Powder. TMS 2017, Feb 2017, San Diego, CA, United States. ⟨hal-01708459⟩
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