Influence of high melting elements on microstructure, tensile strength and creep resistance of the compositionally complex alloy Al10Co25Cr8Fe15Ni36Ti6

Haas, Sebastian; Manzoni, Anna M.; Holzinger, Markus; Glatzel, Uwe

doi:10.1016/j.matchemphys.2021.125163

Cited by 18 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The microstructures of the base, the Hf and the W alloys in polycrystalline state have been published previously before [9,12,13,16]. The base and the Hf alloys are characterized by a large volume fraction of a γ-γ' microstructure and several volume % of Heusler phase, needle-shaped in case of the base alloy and irregularly shaped in case of the Hf [16] W alloy 1220 °C/20 h alloy. The W alloy shows hardly any Heusler phase but a few at the grain boundaries.…”

Section: Resultsmentioning

confidence: 99%

“…The chosen heat treatment parameters are listed in [14,16]. Abbreviations are used to simplify reading.…”

Section: Sample Preparationmentioning

confidence: 99%

“…The temperature chosen for creep experiments was 750 °C and the load was adapted to the cross section, resulting in stresses of 375 and 425 MPa. Experiments in this work were combined with former experiments in which additional stresses were investigated (see [16]).…”

Section: Creep Measurementsmentioning

confidence: 99%

“…Studies have shown that the addition of single trace elements can tune the alloy's properties towards one or the other direction [13,15]. Besides the microstructure, the mechanical properties at elevated temperatures are improved by additions of high melting elements, even in small amounts [16]. Trace elements of Y, W, Zr, Hf and Mo have been added to the base alloy and the improvements in microstructure and thus the mechanical properties have been recorded in previous works [15][16][17], but until now no studies are known about the combination of two such trace elements with different influence.…”

Section: Introductionmentioning

confidence: 99%

“…Besides the microstructure, the mechanical properties at elevated temperatures are improved by additions of high melting elements, even in small amounts [16]. Trace elements of Y, W, Zr, Hf and Mo have been added to the base alloy and the improvements in microstructure and thus the mechanical properties have been recorded in previous works [15][16][17], but until now no studies are known about the combination of two such trace elements with different influence. While adding Hf to the base alloy results in more cuboidal γ' precipitates and more roundish Heusler phases, the addition of W induces a more rounded, spherical γ' precipitates shape [13,17] and the dissolution of the Heusler phase.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Controlling Lattice Misfit and Creep Rate Through the γ' Cube Shapes in the Al10Co25Cr8Fe15Ni36Ti6 Compositionally Complex Alloy with Hf and W Additions

Yesilcicek¹,

Haas

Ocaño³

et al. 2022

High Entropy Alloys & Materials

Self Cite

View full text Add to dashboard Cite

Trace elements play an important role in the fine-tuning of complex material properties. This study focuses on the correlation of microstructure, lattice misfit and creep properties. The compositionally complex alloy Al10Co25Cr8Fe15Ni36Ti6 (in at. %) was tuned with high melting trace elements Hf and W. The microstructure consists of a γ matrix, γ' precipitates and the Heusler phase and it is accompanied by good mechanical properties for high temperature applications. The addition of 0.5 at.% Hf to the Al10Co25Cr8Fe15Ni36Ti6 alloy resulted in more sharp-edged cubic γ′ precipitates and an increase in the Heusler phase amount. The addition of 1 at.% W led to more rounded γ′ precipitates and the dissolution of the Heusler phase. The shapes of the γ' precipitates of the alloys Al9.25Co25Cr8Fe15Ni36Ti6Hf0.25W0.5 and Al9.25Co25Cr8Fe15Ni36Ti6Hf0.5W0.25, that are the alloys of interest in this paper, create a transition from the well-rounded precipitates in the alloy with 1% W containing alloy to the sharp angular particles in the alloy with 0.5% Hf. While the lattice misfit has a direct correlation to the γ' precipitates shape, the creep rate is also related to the amount of the Heusler phase. The lattice misfit increases with decreasing corner radius of the γ' precipitates. So does the creep rate, but it also increases with the amount of Heusler phase. The microstructures were investigated by SEM and TEM, the lattice misfit was calculated from the lattice parameters obtained by synchrotron radiation measurements.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The chosen heat treatment parameters are listed in [14,16]. Abbreviations are used to simplify reading.…”

Section: Sample Preparationmentioning

confidence: 99%

Section: Creep Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Controlling Lattice Misfit and Creep Rate Through the γ' Cube Shapes in the Al10Co25Cr8Fe15Ni36Ti6 Compositionally Complex Alloy with Hf and W Additions

Yesilcicek¹,

Haas

Ocaño³

et al. 2022

High Entropy Alloys & Materials

Self Cite

View full text Add to dashboard Cite

show abstract

Compositionally complex coherent precipitation-strengthened high-entropy alloys: a critical review

et al. 2022

View full text Add to dashboard Cite

Consistent Quantification of Precipitate Shapes and Sizes in Two and Three Dimensions Using Central Moments

Schleifer

Müller

Lin

et al. 2022

Integr Mater Manuf Innov

View full text Add to dashboard Cite

Computational microstructure design aims to fully exploit the precipitate strengthening potential of an alloy system. The development of accurate models to describe the temporal evolution of precipitate shapes and sizes is of great technological relevance. The experimental investigation of the precipitate microstructure is mostly based on two-dimensional micrographic images. Quantitative modeling of the temporal evolution of these microstructures needs to be discussed in three-dimensional simulation setups. To consistently bridge the gap between 2D images and 3D simulation data, we employ the method of central moments. Based on this, the aspect ratio of plate-like particles is consistently defined in two and three dimensions. The accuracy and interoperability of the method is demonstrated through representative 2D and 3D pixel-based sample data containing particles with a predefined aspect ratio. The applicability of the presented approach in integrated computational materials engineering (ICME) is demonstrated by the example of γ″ microstructure coarsening in Ni-based superalloys at 730 °C. For the first time, γ″ precipitate shape information from experimental 2D images and 3D phase-field simulation data is directly compared. This coarsening data indicates deviations from the classical ripening behavior and reveals periods of increased precipitate coagulation.

show abstract

Influence of high melting elements on microstructure, tensile strength and creep resistance of the compositionally complex alloy Al10Co25Cr8Fe15Ni36Ti6

Cited by 18 publications

References 24 publications

Controlling Lattice Misfit and Creep Rate Through the γ' Cube Shapes in the Al10Co25Cr8Fe15Ni36Ti6 Compositionally Complex Alloy with Hf and W Additions

Controlling Lattice Misfit and Creep Rate Through the γ' Cube Shapes in the Al10Co25Cr8Fe15Ni36Ti6 Compositionally Complex Alloy with Hf and W Additions

Compositionally complex coherent precipitation-strengthened high-entropy alloys: a critical review

Consistent Quantification of Precipitate Shapes and Sizes in Two and Three Dimensions Using Central Moments

Contact Info

Product

Resources

About