"TITLE","AUTHORS","SUBJECT","SUBJECT_RELATED","DESCRIPTION","PUBLISHER","AVAILABILITY","RESEARCH_ORG","SPONSORING_ORG","PUBLICATION_COUNTRY","PUBLICATION_DATE","CONTRIBUTING_ORGS","LANGUAGE","RESOURCE_TYPE","TYPE_QUALIFIER","JOURNAL_ISSUE","JOURNAL_VOLUME","RELATION","COVERAGE","FORMAT","IDENTIFIER","REPORT_NUMBER","DOE_CONTRACT_NUMBER","OTHER_IDENTIFIER","DOI","RIGHTS","ENTRY_DATE","OSTI_IDENTIFIER","PURL_URL" "Interactions of impurities with a moving grain boundary","Bauer, C L [Carnegie-Mellon Univ., Pittsburgh, Pa. (USA)]","36 MATERIALS SCIENCE; GRAIN BOUNDARIES; MOBILITY; DIFFUSION; IMPURITIES; CRYSTAL STRUCTURE; MICROSTRUCTURE; 360102* - Metals & Alloys- Structure & Phase Studies","","Most theories developed to explain interaction of impurities with a moving grain boundary involve a uniform excess impurity concentration distributed along a planar grain boundary. As boundary velocity increases, the excess impurities exert a net drag force on the boundary until a level is reached whereat the drag force no longer can balance the driving force and breakaway of the boundary from these impurities occurs. In this investigation, assumptions of a uniform lateral impurity profile and a planar grain boundary shape are relaxed by allowing both forward and lateral diffusion of impurities in the vicinity of a grain boundary. It is found that the two usual regions (drag of impurities by, and breakaway of a planar grain boundary) are separated by an extensive region wherein a uniform lateral impurity profile and a planar grain boundary shape are unstable. It is suspected that, in this unstable region, grain boundaries assume a spectrum of more complex morphologies and that elucidation of these morphologies can provide the first definitive description of the breakaway process and insight to more complex phenomena such as solid-solution strengthening, grain growth and secondary recrystallization.","","","","","France","1975-01-01","","English","Conference","Journal Article","","4","Journal Name: J. Phys. (Paris), Colloq.; (France); Journal Volume: 4; Conference: International colloquium on grain boundaries in metals, Saint-Etienne, France, 16 Jun 1975","","Medium: X; Size: Pages: C4.333-C4.338","","","","Journal ID: CODEN: JPQCA","https://doi.org/","","2008-02-12","7349570",""