Discontinuous precipitation and phase stability in Re- and Ru-containing nickel-base superalloys

Heckl A, Cenanovic S, Göken M, Singer R (2012)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2012

Journal

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science ASM International

Book Volume: 43

Pages Range: 10-19

Journal Issue: 1

DOI: 10.1007/s11661-011-0833-6

Abstract

The phase stability of nickel-base superalloys has been investigated using a new in-house-designed alloy series with stepwise increased additions of Re and Ru at otherwise fixed atomic fractions of alloying elements. Results presented in this study are focused on the lesser-known topologically closed packed (TCP) formation of columnar colonies or so-called discontinuous precipitation. A detailed investigation of these colonies allowed for identifying compositional changes during the growth process and for providing a three-dimensional (3-D) illustration of the TCP phases within these colonies. The results were used to compare the colony growth process with existing growth models. Furthermore, the influence of Re and Ru on the appearance of discontinuous precipitation has been investigated by means of colony width and the effect on creep properties. Larson-Miller plots are given to illustrate the creep strength of directionally solidified samples with and without TCP colonies compared with single crystalline samples free from TCP colonies. © 2011 The Minerals, Metals & Materials Society and ASM International.

Authors with CRIS profile

Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Robert Singer Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

GRK 1229: Stabile und metastabile Mehrphasensysteme bei hohen Anwendungstemperaturen April 1, 2006 - March 30, 2015 Activity Development of high temperature alloys Jan. 1, 1990 - Jan. 1, 1993

How to cite

APA:

Heckl, A., Cenanovic, S., Göken, M., & Singer, R. (2012). Discontinuous precipitation and phase stability in Re- and Ru-containing nickel-base superalloys. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 43(1), 10-19. https://dx.doi.org/10.1007/s11661-011-0833-6

MLA:

Heckl, Astrid, et al. "Discontinuous precipitation and phase stability in Re- and Ru-containing nickel-base superalloys." Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 43.1 (2012): 10-19.

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