Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/91631
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dc.contributorDepartment of Mechanical Engineeringen_US
dc.contributorChinese Mainland Affairs Officeen_US
dc.creatorQiu, Sen_US
dc.creatorZheng, GPen_US
dc.creatorJiao, ZBen_US
dc.date.accessioned2021-11-23T06:06:46Z-
dc.date.available2021-11-23T06:06:46Z-
dc.identifier.issn0966-9795en_US
dc.identifier.urihttp://hdl.handle.net/10397/91631-
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rights© 2021 Elsevier Ltd. All rights reserved.en_US
dc.rights© 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.en_US
dc.rightsThe following publication Qiu, S., Zheng, G. P., & Jiao, Z. B. (2022). Alloying effects on phase stability, mechanical properties, and deformation behavior of CoCrNi-based medium-entropy alloys at low temperatures. Intermetallics, 140, 107399 is available at https://dx.doi.org/10.1016/j.intermet.2021.107399.en_US
dc.subjectAlloying effecten_US
dc.subjectDeformation behavioren_US
dc.subjectFirst-principles calculationen_US
dc.subjectMechanical propertyen_US
dc.subjectMedium-entropy alloyen_US
dc.subjectPhase stabilityen_US
dc.titleAlloying effects on phase stability, mechanical properties, and deformation behavior of CoCrNi-based medium-entropy alloys at low temperaturesen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.volume140en_US
dc.identifier.doi10.1016/j.intermet.2021.107399en_US
dcterms.abstractAlloying plays an important role in determining the phase stability and mechanical behavior of medium/high-entropy alloys (M/HEAs). In this work, the effects of Al, Ti, Mo, and W additions on the phase stability, strengthening behavior, and stacking fault energies of CoCrNi alloys are quantitatively investigated by using first-principles calculations. Our results reveal that the Al, Ti, and W additions enhance the structural stability of metastable face-centered cubic structures, whereas Mo is in favor of the formation of hexagonal close-packed structures at low temperatures. Through analyzing the elastic moduli and lattice mismatch based on a Labusch-type model, we show that the solute strengthening effect decreases in the order W > Mo > Ti > Al. The compositional dependence of intrinsic stacking fault energy (ISFE) and unstable stacking fault energy (USFE) of CoCrNi MEAs was calculated, and the results indicate that the Al, Ti, Mo and W additions significantly reduce the USFE, leading to a reduction in the energy barriers of dislocation slips. The alloying effects on the deformation behaviors of CoCrNi MEAs are discussed in terms of the ratio of ISFE to the energy barrier of dislocation slips. The present study not only sheds light on the fundamental understanding of phase stability and deformation mechanisms of M/HEAs but also provides useful guidelines for the alloy design of advanced M/HEAs with superior mechanical properties.en_US
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationIntermetallics, Jan. 2022, v. 140, 107399en_US
dcterms.isPartOfIntermetallicsen_US
dcterms.issued2022-01-
dc.identifier.scopus2-s2.0-85117817252-
dc.identifier.eissn1879-0216en_US
dc.identifier.artn107399en_US
dc.description.validate202111 bcvcen_US
dc.description.oaAccepted Manuscripten_US
dc.identifier.FolderNumbera1051-n01-
dc.identifier.SubFormID43857-
dc.description.fundingSourceRGCen_US
dc.description.fundingText25202719, 15227121, 152190/18Een_US
dc.description.pubStatusPublisheden_US
dc.description.oaCategoryGreen (AAM)en_US
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