Phase Transformation Induced by High Pressure Torsion in the High-Entropy Alloy CrMnFeCoNi

dc.bibliographicCitation.firstPage8407
dc.bibliographicCitation.issue23
dc.bibliographicCitation.journalTitleMaterialseng
dc.bibliographicCitation.volume15
dc.contributor.authorChulist, Robert
dc.contributor.authorPukenas, Aurimas
dc.contributor.authorChekhonin, Paul
dc.contributor.authorHohenwarter, Anton
dc.contributor.authorPippan, Reinhard
dc.contributor.authorSchell, Norbert
dc.contributor.authorSkrotzki, Werner
dc.date.accessioned2023-01-30T06:09:53Z
dc.date.available2023-01-30T06:09:53Z
dc.date.issued2022
dc.description.abstractThe forward and reverse phase transformation from face-centered cubic (fcc) to hexagonal close-packed (hcp) in the equiatomic high-entropy alloy (HEA) CrMnFeCoNi has been investigated with diffraction of high-energy synchrotron radiation. The forward transformation has been induced by high pressure torsion at room and liquid nitrogen temperature by applying different hydrostatic pressures and large shear strains. The volume fraction of hcp phase has been determined by Rietveld analysis after pressure release and heating-up to room temperature as a function of hydrostatic pressure. It increases with pressure and decreasing temperature. Depending on temperature, a certain pressure is necessary to induce the phase transformation. In addition, the onset pressure depends on hydrostaticity; it is lowered by shear stresses. The reverse transformation evolves over a long period of time at ambient conditions due to the destabilization of the hcp phase. The effect of the phase transformation on the microstructure and texture development and corresponding microhardness of the HEA at room temperature is demonstrated. The phase transformation leads to an inhomogeneous microstructure, weakening of the shear texture, and a surprising hardness anomaly. Reasons for the hardness anomaly are discussed in detail.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/11156
dc.identifier.urihttp://dx.doi.org/10.34657/10182
dc.language.isoeng
dc.publisherBasel : MDPI
dc.relation.doihttps://doi.org/10.3390/ma15238407
dc.relation.essn1996-1944
dc.rights.licenseCC BY 4.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.subject.ddc600
dc.subject.otherhigh pressure torsioneng
dc.subject.otherhigh-entropy alloyeng
dc.subject.othermicrostructureeng
dc.subject.otherphase transformationeng
dc.subject.otherstrengtheng
dc.subject.othertextureeng
dc.titlePhase Transformation Induced by High Pressure Torsion in the High-Entropy Alloy CrMnFeCoNieng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccess
wgl.contributorIFWD
wgl.subjectPhysikger
wgl.typeZeitschriftenartikelger
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