The effect of Ru on precipitation of topologically close packed phases in Re-containing Ni base superalloys: Quantitative FIB-SEM investigation and 3D image modeling

Matuszewski K, Rettig R, Singer R (2014)


Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2014

Publisher: EDP Sciences

Book Volume: 14

Article Number: 09001

Event location: Giens

DOI: 10.1051/matecconf/20141409001

Abstract

A new approach to clarify the ruthenium effect on the precipitation of topologically close packed (TCP) phases is described in the paper. It is based on focused ion beam-scanning electron microscopy (FIB-SEM) dual beam methodology as well as three-dimensional imaging. The high-temperature capabilities of nickel base superalloys can be improved by alloying with refractory elements. With excessive refractory element content or excessive exposure to high temperature, brittle TCP phases precipitate resulting in a drop of strength. The undesirable phase transformation can be suppressed by addition of ruthenium. Although the effect is well known, its real mechanism remains open. In the present paper, the volume fraction and particle density, as well as the exact three-dimensional morphology of TCP phases as measured by FIB-SEM will be presented. The effect of ruthenium content and time of exposure is studied quantitatively. The results show that increased Ru additions slow down all stages of phase transformation and also reduce the equilibrium TCP volume fraction. The Ru effect might be due to either reduced driving force for precipitation or reduced interfacial energy. © 2014 Owned by the authors, published by EDP Sciences.

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APA:

Matuszewski, K., Rettig, R., & Singer, R. (2014). The effect of Ru on precipitation of topologically close packed phases in Re-containing Ni base superalloys: Quantitative FIB-SEM investigation and 3D image modeling. In Proceedings of the 2nd European Symposium on Superalloys and Their Applications, EUROSUPERALLOYS 2014. Giens: EDP Sciences.

MLA:

Matuszewski, Kamil, Ralf Rettig, and Robert Singer. "The effect of Ru on precipitation of topologically close packed phases in Re-containing Ni base superalloys: Quantitative FIB-SEM investigation and 3D image modeling." Proceedings of the 2nd European Symposium on Superalloys and Their Applications, EUROSUPERALLOYS 2014, Giens EDP Sciences, 2014.

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