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  Design of a dual-phase hcp-bcc high entropy alloy strengthened by ω nanoprecipitates in the Sc–Ti–Zr–Hf–Re system

Rogal, L., Ikeda, Y., Lai, M., Körmann, F., Kalinowska, A., & Grabowski, B. (2020). Design of a dual-phase hcp-bcc high entropy alloy strengthened by ω nanoprecipitates in the Sc–Ti–Zr–Hf–Re system. Materials and Design, 192: 108716. doi:10.1016/j.matdes.2020.108716.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0007-0AB5-2 Version Permalink: https://hdl.handle.net/21.11116/0000-0007-0ACC-9
Genre: Journal Article

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 Creators:
Rogal, Lukasz1, Author           
Ikeda, Yuji2, 3, Author           
Lai, Minjie4, Author           
Körmann, Fritz5, 6, Author           
Kalinowska, Alicja7, Author           
Grabowski, Blazej8, Author           
Affiliations:
1Institute of Metallurgy and Materials Science of the Polish Academy of Sciences, 30-059, Krakow, Poland, ou_persistent22              
2Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863337              
3Institute of Materials Science, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, ou_persistent22              
4Northwestern Polytechnical University, State Key Laboratory of Solidification Processing, Xian 710072, Shaanxi, China, ou_persistent22              
5Computational Phase Studies, Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863341              
6Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands, ou_persistent22              
7Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25, Reymonta Street, 30-059 Krakow, Poland, ou_persistent22              
8Institute of Materials Science, University of Stuttgart, Pfaffenwaldring 55, Stuttgart, 70569, Germany, ou_persistent22              

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Free keywords: Compressive strength; Entropy; Hafnium alloys; High-entropy alloys; Microstructure; Precipitation (chemical); Scandium alloys; Titanium alloys; Zircaloy, Ab initio simulations; Body-centered cubic; Dual phase; Experimental investigations; Hexagonal close packed; Nanoprecipitates; Omega phase; Technological level, Rhenium alloys
 Abstract: High entropy alloys (HEAs) in the hexagonal close-packed (hcp) phase usually show poor mechanical properties. We demonstrate here, by use of ab initio simulations and detailed experimental investigations, that the mechanical properties can be improved by optimizing the microstructure. In particular we design a dual-phase HEA consisting of a body-centered cubic (bcc) matrix and hcp laths, with nanoprecipitates of the ω phase in the Sc-Ti-Zr-Hf-Re system, by controlling the Re content. This dedicated microstructure reveals, already in the as-cast state, high compressive strength and good ductility of 1910 MPa and 8, respectively. Our study lifts the hcp-based HEAs onto a competitive, technological level. © 2020 The Authors

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Language(s): eng - English
 Dates: 2020-07
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.matdes.2020.108716
 Degree: -

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Project name : The research was supported by the Polish science financial resources The National Science Centre, Poland , project title: “Development of new high entropy alloys with dominant content of hexagonal solid solutions” project number: UMO-2014/15/D/ST8/02638 . Support from the Deutsche Forschungsgemeinschaft (SPP 2006), NWO / STW (VIDI grant 15707 ), and the European Research Council (ERC) under the EU's Horizon 2020 Research and Innovation Programme (Grant no. 639211 ) are also gratefully acknowledged.
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Title: Materials and Design
  Other : Materials & Design
  Abbreviation : Mater. Des.
Source Genre: Journal
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Publ. Info: Reigate, Surrey, Eng. : Elsevier
Pages: 7 Volume / Issue: 192 Sequence Number: 108716 Start / End Page: - Identifier: ISSN: 0264-1275
CoNE: https://pure.mpg.de/cone/journals/resource/954926234428