You Rao^1*, Carolina Baruffi^1*, Anthony De Luca^2*, Christian Leinenbach^2*, William Curtin^1*

1 Laboratory for Multiscale Mechanics Modeling, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

2 Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland

* Corresponding authors emails: you.rao@epfl.ch, carolina.baruffi@epfl.ch, anthony.deluca@empa.ch, christian.leinenbach@empa.ch, william.curtin@epfl.ch

DOI10.24435/materialscloud:a4-yf [version v1]

Publication date: Nov 10, 2022

How to cite this record

You Rao, Carolina Baruffi, Anthony De Luca, Christian Leinenbach, William Curtin, Theory-guided design of high-strength, high-melting point, ductile, low-density, single-phase BCC high entropy alloys, Materials Cloud Archive 2022.144 (2022), doi: 10.24435/materialscloud:a4-yf.

Description

The search for new high-temperature alloys that can enable higher-efficiency/lower-emissions power generation has accelerated with the discovery of body-centered cubic (bcc) refractory High Entropy Alloys (HEAs). These many-component, non-dilute alloys in the Cr-Mo-W-V-Nb-Ta-Ti-Zr-Hf-Al family hold the potential for combining high strength and thermodynamic stability at high temperature with low density and room-temperature ductility, but searching the immense compositional space is daunting. Here, very recent theories and expanded thermodynamic tools are used to guide the discovery of new alloys satisfying the required suite of properties. We present the dataset we generated in search for such alloys, including 5-component equicomposition alloys, as well as new quinary and quarternary alloys in the Hf-Mo-Nb-Ta-Ti space having even better overall properties (high strength, high strength retention, good ductility, light weight and single phase).

Materials Cloud sections using this data

Files

File name	Size	Description
Alloy_selection.xlsx MD5md5:1729672781567080b2efdd9ea871f0d6	38.7 KiB	List of properties of the selected promising off-equiatomic alloys
quinary_ductile.ods MD5md5:60bf4f8cc78ef9137bd7bdb900001965	6.2 KiB	List of properties of the selected promising equiatomic quinary alloys
thermo_properties.zip MD5md5:0840f8b67282e2d3e992db913264a0a3	731.0 KiB	Calculated thermodynamic properties of the studied alloys

License

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Metadata, except for email addresses, are licensed under the Creative Commons Attribution Share-Alike 4.0 International license.

External references

Keywords

EPFL MARVEL high entropy alloys materials selection