Effect of the synthesis route on the microstructure of HfxTi(1−x)NbVZr refractory high-entropy alloys
| hal.structure.identifier | Université du Québec à Trois-Rivières [UQTR] | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MOUSSA, Maria | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GORSSE, Stéphane | |
| hal.structure.identifier | Université du Québec à Trois-Rivières [UQTR] | |
| dc.contributor.author | HUOT, Jacques | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | BOBET, Jean-Louis | |
| dc.date.issued | 2023 | |
| dc.identifier.issn | 2075-4701 | |
| dc.description.abstractEn | In the present work, the effects of (i) Ti replacement by Hf and (ii) the synthesis method on microstructure and crystal structure evolution in the high-entropy alloy HfxTi(1−x)NbVZr are reported. The results of scanning electron microscopy and X-ray diffraction analysis of alloys prepared by both arc-melting and induction-melting are compared with theoretical thermodynamic calculations using the CALPHAD approach. The non-equilibrium thermodynamic calculations agree well with the experimental observations for the arc-melted alloys: a mixture of body-centered cubic (BCC) and cubic C15 Laves phases occurs for low-Ti-concentration alloys and a single BCC phase is obtained for high-Ti alloys. The agreement is not as good when using the induction-melting method: equilibrium solidification calculations predict that the most stable state is a phase mixture of BCC, hexagonal close-packed, and a cubic C15 Laves phase, while experimentally only one BCC and one hexagonal C14 Laves phase were found. The estimation of the exact cooling rate and the lack of a thermodynamic database can explain the difference. In addition, for both methods, the thermodynamic calculation confirms that for a high Ti concentration, the BCC phase is stable, whereas phase separation is enhanced with a higher Hf concentration. | |
| dc.language.iso | en | |
| dc.publisher | MDPI | |
| dc.subject.en | refractory high entropy alloy | |
| dc.subject.en | arc-melting | |
| dc.subject.en | induction-melting | |
| dc.subject.en | microstructure | |
| dc.subject.en | CALPHAD | |
| dc.title.en | Effect of the synthesis route on the microstructure of HfxTi(1−x)NbVZr refractory high-entropy alloys | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.3390/met13020343 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Metals | |
| bordeaux.page | 343 | |
| bordeaux.volume | 13 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-04035263 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-04035263v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Metals&rft.date=2023&rft.volume=13&rft.issue=2&rft.spage=343&rft.epage=343&rft.eissn=2075-4701&rft.issn=2075-4701&rft.au=MOUSSA,%20Maria&GORSSE,%20St%C3%A9phane&HUOT,%20Jacques&BOBET,%20Jean-Louis&rft.genre=article |
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