Persistent Link:
http://hdl.handle.net/10150/291693
Title:
On aluminum grain boundary structure and segregation
Author:
Vazquez, Isaura, 1960-
Issue Date:
1991
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The effect of an alloying agent, such as Mg, on Al grain boundary microstructure and chemistry was investigated. HREM measurements on an Al-5% Mg Σ = 5 (310) grain boundary showed Al grain boundary structure modification because of the presence of Mg. Chemical analysis, through TEM/STEM EDS of Al-2% Mg alloy, indicated the possibility of Mg segregation at Al grain boundaries, although this should be further investigated. An experiment is proposed to determine the change in grain boundary torque with impurity chemical potential. Molecular dynamic simulations of the effect of segregated vacancies was also studied. This study showed that grain boundaries act as sinks for vacancies. In addition, the presence of vacancies caused a relocation of the grain boundary plane, through a sliding-migration, or atomic restructuring of the boundary depending upon the vacancy distribution.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Physics, Condensed Matter.; Engineering, Materials Science.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Materials Science and Engineering
Degree Grantor:
University of Arizona
Advisor:
Deymier, Pierre A.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleOn aluminum grain boundary structure and segregationen_US
dc.creatorVazquez, Isaura, 1960-en_US
dc.contributor.authorVazquez, Isaura, 1960-en_US
dc.date.issued1991en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe effect of an alloying agent, such as Mg, on Al grain boundary microstructure and chemistry was investigated. HREM measurements on an Al-5% Mg Σ = 5 (310) grain boundary showed Al grain boundary structure modification because of the presence of Mg. Chemical analysis, through TEM/STEM EDS of Al-2% Mg alloy, indicated the possibility of Mg segregation at Al grain boundaries, although this should be further investigated. An experiment is proposed to determine the change in grain boundary torque with impurity chemical potential. Molecular dynamic simulations of the effect of segregated vacancies was also studied. This study showed that grain boundaries act as sinks for vacancies. In addition, the presence of vacancies caused a relocation of the grain boundary plane, through a sliding-migration, or atomic restructuring of the boundary depending upon the vacancy distribution.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectPhysics, Condensed Matter.en_US
dc.subjectEngineering, Materials Science.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineMaterials Science and Engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorDeymier, Pierre A.en_US
dc.identifier.proquest1343833en_US
dc.identifier.bibrecord.b26882644en_US
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