Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys

Tailoring the partitioning behavior of solid solution strengtheners is a crucial design strategy for advanced Ni-based superalloys. The goal of this study was to maximize the enrichment of Mo, Re, Ru and W in the γ-matrix phase. To determine the composition dependency of the partitioning behavior, a...

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Autores principales:	Tobias Gaag, Nils Ritter, Alexandra Peters, Nicklas Volz, Daniel Gruber, Steffen Neumeier, Christopher Zenk, Carolin Körner
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Ni-based superalloys creep solid solution strengthening partitioning behavior DSC CALPHAD Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/c0c8bb6e0d04422d9ae66c3d7e1f2f9b
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spelling	oai:doaj.org-article:c0c8bb6e0d04422d9ae66c3d7e1f2f9b2021-11-25T18:21:22ZImproving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys10.3390/met111117072075-4701https://doaj.org/article/c0c8bb6e0d04422d9ae66c3d7e1f2f9b2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1707https://doaj.org/toc/2075-4701Tailoring the partitioning behavior of solid solution strengtheners is a crucial design strategy for advanced Ni-based superalloys. The goal of this study was to maximize the enrichment of Mo, Re, Ru and W in the γ-matrix phase. To determine the composition dependency of the partitioning behavior, a set of polycrystalline superalloys with varying contents of these solid solution-strengthening elements and a W-containing single-crystalline alloy series with varying concentrations of the γ′-forming elements Ta and Ti was produced. Assessed properties include phase compositions by electron-probe micro-analysis, phase transformation temperatures by differential scanning calorimetry and creep behavior. Re exhibits the most pronounced enrichment in the γ-matrix, followed by Mo, Ru and W. Due to the preference of the Al-sites in the γ′-phase in the order Ta > Ti > W > Mo > Re, the solid solution strengthening elements Mo, Re and W are displaced from the γ′-phase by increasing Ti and Ta contents. The investigated solutes do not directly influence the partitioning behavior of Ru as it prefers Ni-sites in the γ′-phase. Compressive creep experiments reveal a correlation between the content of solid solution strengtheners in the γ-phase and creep performance.Tobias GaagNils RitterAlexandra PetersNicklas VolzDaniel GruberSteffen NeumeierChristopher ZenkCarolin KörnerMDPI AGarticleNi-based superalloyscreepsolid solution strengtheningpartitioning behaviorDSCCALPHADMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1707, p 1707 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ni-based superalloys creep solid solution strengthening partitioning behavior DSC CALPHAD Mining engineering. Metallurgy TN1-997
spellingShingle	Ni-based superalloys creep solid solution strengthening partitioning behavior DSC CALPHAD Mining engineering. Metallurgy TN1-997 Tobias Gaag Nils Ritter Alexandra Peters Nicklas Volz Daniel Gruber Steffen Neumeier Christopher Zenk Carolin Körner Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys
description	Tailoring the partitioning behavior of solid solution strengtheners is a crucial design strategy for advanced Ni-based superalloys. The goal of this study was to maximize the enrichment of Mo, Re, Ru and W in the γ-matrix phase. To determine the composition dependency of the partitioning behavior, a set of polycrystalline superalloys with varying contents of these solid solution-strengthening elements and a W-containing single-crystalline alloy series with varying concentrations of the γ′-forming elements Ta and Ti was produced. Assessed properties include phase compositions by electron-probe micro-analysis, phase transformation temperatures by differential scanning calorimetry and creep behavior. Re exhibits the most pronounced enrichment in the γ-matrix, followed by Mo, Ru and W. Due to the preference of the Al-sites in the γ′-phase in the order Ta > Ti > W > Mo > Re, the solid solution strengthening elements Mo, Re and W are displaced from the γ′-phase by increasing Ti and Ta contents. The investigated solutes do not directly influence the partitioning behavior of Ru as it prefers Ni-sites in the γ′-phase. Compressive creep experiments reveal a correlation between the content of solid solution strengtheners in the γ-phase and creep performance.
format	article
author	Tobias Gaag Nils Ritter Alexandra Peters Nicklas Volz Daniel Gruber Steffen Neumeier Christopher Zenk Carolin Körner
author_facet	Tobias Gaag Nils Ritter Alexandra Peters Nicklas Volz Daniel Gruber Steffen Neumeier Christopher Zenk Carolin Körner
author_sort	Tobias Gaag
title	Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys
title_short	Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys
title_full	Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys
title_fullStr	Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys
title_full_unstemmed	Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys
title_sort	improving the effectiveness of the solid-solution-strengthening elements mo, re, ru and w in single-crystalline nickel-based superalloys
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c0c8bb6e0d04422d9ae66c3d7e1f2f9b
work_keys_str_mv	AT tobiasgaag improvingtheeffectivenessofthesolidsolutionstrengtheningelementsmoreruandwinsinglecrystallinenickelbasedsuperalloys AT nilsritter improvingtheeffectivenessofthesolidsolutionstrengtheningelementsmoreruandwinsinglecrystallinenickelbasedsuperalloys AT alexandrapeters improvingtheeffectivenessofthesolidsolutionstrengtheningelementsmoreruandwinsinglecrystallinenickelbasedsuperalloys AT nicklasvolz improvingtheeffectivenessofthesolidsolutionstrengtheningelementsmoreruandwinsinglecrystallinenickelbasedsuperalloys AT danielgruber improvingtheeffectivenessofthesolidsolutionstrengtheningelementsmoreruandwinsinglecrystallinenickelbasedsuperalloys AT steffenneumeier improvingtheeffectivenessofthesolidsolutionstrengtheningelementsmoreruandwinsinglecrystallinenickelbasedsuperalloys AT christopherzenk improvingtheeffectivenessofthesolidsolutionstrengtheningelementsmoreruandwinsinglecrystallinenickelbasedsuperalloys AT carolinkorner improvingtheeffectivenessofthesolidsolutionstrengtheningelementsmoreruandwinsinglecrystallinenickelbasedsuperalloys
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Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys

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