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Article

Solid Solution Strengthening of Mo, Re, Ta and W in Ni during High-Temperature Creep

Department of Materials Science & Engineering, Institute I: General Materials Properties, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
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Academic Editor: Elisabetta Gariboldi
Metals 2021, 11(12), 1909; https://doi.org/10.3390/met11121909
Received: 27 October 2021 / Revised: 16 November 2021 / Accepted: 22 November 2021 / Published: 26 November 2021
(This article belongs to the Special Issue Creep Behavior of Metals and Alloys)
Solid solution strengthening of the unordered γ matrix phase by alloying elements is of great importance during creep of Ni-based superalloys, particularly at high temperatures above 1000 °C. To study the role of different potent solutes, we have conducted creep experiments on binary Ni-2X alloys (X = Mo, Re, Ta, W) at 1000 °C, 1050 °C, and 1100 °C at a constant stress of 20 MPa. Compared to mechanical tests below 800 °C, where the size of the elements mostly determines the solid solution hardening contribution, the strengthening contribution of the different alloying elements above 1000 °C directly correlates with their diffusivity. Therefore, elements such as Ta that lead to strong solid solution hardening at low temperatures become less effective at higher temperatures and are exceeded by slower diffusing elements, such as Re. View Full-Text
Keywords: nickel; diffusion; solid solution hardening; creep nickel; diffusion; solid solution hardening; creep
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MDPI and ACS Style

Haußmann, L.; ur Rehman, H.; Matschkal, D.; Göken, M.; Neumeier, S. Solid Solution Strengthening of Mo, Re, Ta and W in Ni during High-Temperature Creep. Metals 2021, 11, 1909. https://doi.org/10.3390/met11121909

AMA Style

Haußmann L, ur Rehman H, Matschkal D, Göken M, Neumeier S. Solid Solution Strengthening of Mo, Re, Ta and W in Ni during High-Temperature Creep. Metals. 2021; 11(12):1909. https://doi.org/10.3390/met11121909

Chicago/Turabian Style

Haußmann, Lukas, Hamad ur Rehman, Dorothea Matschkal, Mathias Göken, and Steffen Neumeier. 2021. "Solid Solution Strengthening of Mo, Re, Ta and W in Ni during High-Temperature Creep" Metals 11, no. 12: 1909. https://doi.org/10.3390/met11121909

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