Bimodal grain microstructure development during hot compression of a cast-homogenized Mg-Zn-Zr alloy

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dc.contributor.authorHadadzadeh, Amir
dc.contributor.authorMokdad, Fatma
dc.contributor.authorShalchi Amirkhiz, Babak
dc.contributor.authorWells, Mary
dc.contributor.authorWilliams, Bruce W.
dc.contributor.authorChen, Daolun L.
dc.date.accessioned2018-07-31T15:30:51Z
dc.date.available2018-07-31T15:30:51Z
dc.date.issued2018-05-02
dc.descriptionThe final publication is available at Elsevier via https://doi.org/10.1016/j.msea.2018.03.112. © 2018. This manuscript version is made available under the CCBY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.description.abstractHot deformation of a cast-homogenized ZK60 alloy was studied by compression at a temperature of 450 °C and a strain rate of 0.001 s−1 to investigate microstructural evolution. The deformed microstructure was characterized using electron backscatter diffraction (EBSD) and high resolution transmission electron microscopy (HRTEM). EBSD observations of the deformed microstructure showed that hot deformation of this alloy resulted in a bimodal grain microstructure consisting of large pancaked unrecrystallized dendrites surrounded by recrystallized equiaxed fine grains. HRTEM studies revealed the presence of nano-(Zn-Zr)-precipitates in the deformed microstructure. Due to the coherency of precipitates/matrix, the dislocations were pinned by the nano-precipitates inside the unrecrystallized grains and the dislocation motion inside the grains was impeded, hence, a substructure evolved. Consequently, dynamic recrystallization (DRX) was suppressed and deformation was concentrated inside the DRXed region.en
dc.description.sponsorshipNatural Sciences and Engineering Research Council || Automotive Partnership Canada Grant APCPJ 459269en
dc.description.sponsorshipMultimatic Technical Centre
dc.description.sponsorshipFord Motor Company
dc.description.sponsorshipCenterline Windsor
dc.identifier.issn0921-5093
dc.identifier.urihttps://doi.org/10.1016/j.msea.2018.03.112
dc.identifier.urihttp://hdl.handle.net/10012/13501
dc.language.isoenen
dc.publisherElsevieren
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectmagnesium alloyen
dc.subjectdynamic recrystallizationen
dc.subjectEBSDen
dc.subjectHRTEMen
dc.subjectdislocationen
dc.titleBimodal grain microstructure development during hot compression of a cast-homogenized Mg-Zn-Zr alloyen
dc.typeArticleen
dcterms.bibliographicCitationHadadzadeh, A., Mokdad, F., Amirkhiz, B. S., Wells, M. A., Williams, B. W., & Chen, D. L. (2018). Bimodal grain microstructure development during hot compression of a cast-homogenized Mg-Zn-Zr alloy. Materials Science and Engineering: A, 724, 421–430. https://doi.org/10.1016/j.msea.2018.03.112en
uws.contributor.affiliation1Faculty of Engineeringen
uws.contributor.affiliation2Mechanical and Mechatronics Engineeringen
uws.peerReviewStatusRevieweden
uws.scholarLevelFacultyen
uws.scholarLevelPost-Doctorateen
uws.typeOfResourceTexten

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