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Theory-guided design of high-strength, high-melting point, ductile, low-density, single-phase BCC high entropy alloys

You Rao1*, Carolina Baruffi1*, Anthony De Luca2*, Christian Leinenbach2*, William Curtin1*

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.


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).

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File name Size Description
38.7 KiB List of properties of the selected promising off-equiatomic alloys
6.2 KiB List of properties of the selected promising equiatomic quinary alloys
731.0 KiB Calculated thermodynamic properties of the studied alloys


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External references

Journal reference
Rao, Y., et al. Acta Materialia 237, 118132 (2022) doi:10.1016/j.actamat.2022.118132


EPFL MARVEL high entropy alloys materials selection

Version history:

2022.144 (version v1) [This version] Nov 10, 2022 DOI10.24435/materialscloud:a4-yf