Hierarchical eutectoid nano-lamellar decomposition in an Al0.3CoFeNi complex concentrated alloys
| hal.structure.identifier | Advanced Materials and Manufacturing Processes Institute | |
| dc.contributor.author | DASARI, Sriswaroop | |
| hal.structure.identifier | Physical and Computational Sciences Directorate | |
| dc.contributor.author | GWALANI, Bharat | |
| hal.structure.identifier | Advanced Materials and Manufacturing Processes Institute | |
| dc.contributor.author | JAGETIA, Abhinav | |
| hal.structure.identifier | Advanced Materials and Manufacturing Processes Institute | |
| dc.contributor.author | SONI, Vishal | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GORSSE, Stéphane | |
| hal.structure.identifier | Advanced Materials and Manufacturing Processes Institute | |
| dc.contributor.author | BANERJEE, Rajarshi | |
| dc.date.issued | 2020-12 | |
| dc.identifier.issn | 2045-2322 | |
| dc.description.abstractEn | This paper reports a novel eutectoid nano-lamellar (FCC + L12)/(BCC + B2) microstructure that has been discovered in a relatively simple Al0.3CoFeNi high entropy alloy (HEA) or complex concentrated alloy (CCA). This novel eutectoid nano-lamellar microstructure presumably results from the complex interplay between Al-mediated lattice distortion (due to its larger atomic radius) in a face-centered cubic (FCC) CoFeNi solid solution, and a chemical ordering tendency leading to precipitation of ordered phases such as L12 and B2. This eutectoid microstructure is a result of solid-state decomposition of the FCC matrix and therefore distinct from the commonly reported eutectic microstructure in HEAs which results from solidification. This novel nano-lamellar microstructure exhibits a tensile yield strength of 1074 MPa with a reasonable ductility of 8%. The same alloy can be tuned to form a more damage-tolerant FCC + B2 microstructure, retaining high tensile yield stress (~900 MPa) with appreciable tensile ductility (>20%), via annealing at 700 °C. Such tunability of microstructures with dramatically different mechanical properties can be effectively engineered in the same CCA, by exploiting the complex interplay between ordering tendencies and lattice distortion. | |
| dc.language.iso | en | |
| dc.publisher | Nature Publishing Group | |
| dc.title.en | Hierarchical eutectoid nano-lamellar decomposition in an Al0.3CoFeNi complex concentrated alloys | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1038/s41598-020-61538-6 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Scientific Reports | |
| bordeaux.page | 4836 (15 p.) | |
| bordeaux.volume | 10 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02558742 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02558742v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Scientific%20Reports&rft.date=2020-12&rft.volume=10&rft.spage=4836%20(15%20p.)&rft.epage=4836%20(15%20p.)&rft.eissn=2045-2322&rft.issn=2045-2322&rft.au=DASARI,%20Sriswaroop&GWALANI,%20Bharat&JAGETIA,%20Abhinav&SONI,%20Vishal&GORSSE,%20St%C3%A9phane&rft.genre=article |
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