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β'' needle-shape precipitate formation in Al-Mg-Si alloy: Phase field simulation and experimental verification

dc.contributor.authorMao, Hong
dc.contributor.authorKong, Yi
dc.contributor.authorCai, Dan
dc.contributor.authorYang, Mingjun
dc.contributor.authorPeng, Yingbiao
dc.contributor.authorZeng, Yinping
dc.contributor.authorZhang, Geng
dc.contributor.authorShuai, Xiong
dc.contributor.authorHuang, Qi
dc.contributor.authorLi, Kai
dc.contributor.authorZapolsky, Helena
dc.contributor.authorDu, Yong
dc.date.accessioned2020-06-25T06:28:13Z
dc.date.available2020-06-25T06:28:13Z
dc.date.issued2020-06-20
dc.date.submitted2020-02-23
dc.identifier.citationMao, H., Kong, Y., Cai, D., Yang, M., Peng, Y., Zeng, Y., … Du, Y. (2020). β’’ needle-shape precipitate formation in Al-Mg-Si alloy: Phase field simulation and experimental verification. Computational Materials Science, 184, 109878. doi:10.1016/j.commatsci.2020.109878
dc.identifier.issn0927-0256
dc.identifier.doi10.1016/j.commatsci.2020.109878
dc.identifier.urihttp://hdl.handle.net/10754/663849
dc.description.abstractβ'' needle-shape precipitate structures significantly affect the mechanical properties of 6xxx aluminum alloys. In this study, a modified multi-phase field (MPF) method combined with the thermodynamic and kinetic databases provided with the CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) method has been employed to investigate the morphological evolution of the monoclinic β'' precipitates in Al-Mg-Si alloy. Emphasis has been placed on understanding the influences of interfacial energy anisotropy and elastic interaction on the shape of β'' precipitates. It is shown that the high anisotropic strain alone cannot explain the needle shape of β'' precipitates. In the case of considering the contributions from both anisotropic interfacial energy and elastic interaction simultaneously, the simulations lead to the formation of unique micro-needle-like structures in age strengthening 6xxx Al alloy. The simulation results are compared with plate-shaped θ'(Al2Cu) precipitate in Al-Cu system, and verified with high-resolution transmission electron microscopy (HRTEM) images of needle-like β'' precipitates in Al-Mg-Si system.
dc.description.sponsorshipThis study was funded by the National Natural Science Foundation of China (Grant Numbers: 51531009, 51771234) and National Key R&D Program of China (2018YFB0704003). Thanks to Guangxi Natural Science Foundation under Grant No.AD19245052&AD19110008. Hong Mao also thanks the project of the CSU Special Scholarship for Study Abroad to attend the exchange program. The data that support the findings of this study are available from the authors upon reasonable request.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0927025620303694
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Computational Materials Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Computational Materials Science, [184, , (2020-06-20)] DOI: 10.1016/j.commatsci.2020.109878 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleβ'' needle-shape precipitate formation in Al-Mg-Si alloy: Phase field simulation and experimental verification
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalComputational Materials Science
dc.rights.embargodate2022-06-20
dc.eprint.versionPost-print
dc.contributor.institutionState Key Lab of Powder Metallurgy, Central South University, Changsha, Hunan 410083, PR China
dc.contributor.institutionSchool of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi 541004, PR China
dc.contributor.institutionCollege of Metallurgical and Materials Engineering, Hunan University of Technology, Zhuzhou, Hunan 412008, PR China
dc.contributor.institutionGroupe de Physique des Matériaux, UMR 6634 CNRS, University of Rouen, Avenue de l'Université 76301, Saint Etienne du Rouvray 76801, France
dc.identifier.volume184
dc.identifier.pages109878
kaust.personZhang, Geng
dc.date.accepted2020-06-12
dc.identifier.eid2-s2.0-85086628346
dc.date.published-online2020-06-20
dc.date.published-print2020-11


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