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Precipitation Kinetics Study of Al – Zr – X(Sc or Ti) Alloys by Phase Field Simulations and Atom Probe Tomography

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Abstract:

Phase field modeling of precipitation kinetics in Al – Zr – Sc and Al – Zr – Ti ternary alloys has been performed. The free energy was evaluated using the Thermo-calc data. Our simulations showed that L12 precipitates in Al – Zr – Sc alloy consists of Sc rich zone of in core and Zirconium rich zone at the precipitate / matrix interface. In Al – Zr – Ti system, Al3 (Zr-Ti) precipitates are homogeneous and no segregation is observed. Phase-field simulation results are compared with 3D APT data.

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Periodical:

Solid State Phenomena (Volumes 172-174)

Pages:

869-874

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.172-174.869

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Online since:

June 2011

Authors:

Nicolas Masquelier, Helena Zapolsky, Williams Lefebvre, Suzana Gomes Fries, Renaud Patte, Philippe Pareige

Keywords:

Al-Zr-Ti Alloy, Coarsening, Phase-Field Models

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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