dc.contributor.author | Koizumi, Yuichiro | |
dc.contributor.author | Allen, Samuel Miller | |
dc.contributor.author | Ouchi, Masayuki | |
dc.contributor.author | Minamino, Yoritoshi | |
dc.date.accessioned | 2012-03-26T16:38:46Z | |
dc.date.available | 2012-03-26T16:38:46Z | |
dc.date.issued | 2010-02 | |
dc.date.submitted | 2009-11 | |
dc.identifier.issn | 0966-9795 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/69858 | |
dc.description.abstract | Effects of segregation of solute atoms and vacancies on migration of antiphase boundaries (APBs) in stoichiometric (Fe-25 at%Al) and Al-rich (Fe-28 at%Al) Fe₃Al at 673 K have been studied using a phase-field method in which local vacancy concentration is taken into account [Koizumi Y, Allen SM, Minamino Y. Acta Mater 2008;56:5861, ibid. 2009;57:3039]. Boundary mobility (M) of APBs having different phase-shift vectors of a/4<111> and a/2<100> (hereafter denoted as B2-APB and D0₃-APB, respectively) was evaluated by measuring the boundary velocity of shrinking circular APBs. Similar effects of the segregation on the migration of B2-APBs were observed in both compositions. Vacancies segregated and Al-atoms were depleted at B2-APBs in both compositions. Vacancy concentration at B2-APBs was up to 80% higher than that in the bulk. As a result, the migration of B2-APBs was greatly enhanced by the vacancy segregation. In contrast, the segregation to D0₃-APBs showed a marked composition dependence. Vacancies were depleted and Al-atoms segregated at D0₃-APBs in the Al-rich Fe₃Al, whereas vacancies segregated and Al-atoms were depleted at D0₃-APB in the stoichiometric Fe₃Al. The Al segregation in the Al-rich Fe3Al decreased M of D0₃-APBs much more significantly than the Al-depletion in the stoichiometric Fe₃Al. As the APDs shrank, D0₃-APBs broke away from the segregation atmospheres and the M increased rapidly in both compositions. A greater increase in the M due to the breakaway was observed in the Al-rich Fe₃Al than in Fe₃Al with the stoichiometric composition. | en_US |
dc.description.sponsorship | Iketani Science and Technology Promotion Foundation | en_US |
dc.language.iso | en_US | |
dc.publisher | Elsevier B.V. | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1016/j.intermet.2009.12.016 | en_US |
dc.rights | Creative Commons Attribution-Noncommercial-Share Alike 3.0 | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/3.0/ | en_US |
dc.source | Prof. Allen via Angie Locknar | en_US |
dc.title | Effects of solute and vacancy segregation on antiphase boundary migration in stoichiometric and Al-rich Fe₃Al: a phase-field simulation study | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Koizumi, Yuichiro et al. “Effects of Solute and Vacancy Segregation on Antiphase Boundary Migration in Stoichiometric and Al-rich Fe₃Al: A Phase-field Simulation Study.” Intermetallics 18.7 (2010): 1297–1302. | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Materials Science and Engineering | en_US |
dc.contributor.approver | Allen, Samuel Miller | |
dc.contributor.mitauthor | Allen, Samuel Miller | |
dc.relation.journal | Intermetallics | en_US |
dc.eprint.version | Author's final manuscript | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Koizumi, Yuichiro; Allen, Samuel M.; Ouchi, Masayuki; Minamino, Yoritoshi | en |
dc.identifier.orcid | https://orcid.org/0000-0002-6082-332X | |
mit.license | OPEN_ACCESS_POLICY | en_US |
mit.metadata.status | Complete | |