Structure-property relationships in an Al matrix Ca nanofilamentary composite conductor with potential application in high-voltage power transmission

dc.contributor.advisor Alan M. Russell
dc.contributor.advisor Iver E. Anderson
dc.contributor.author Tian, Liang
dc.contributor.department Materials Science and Engineering
dc.date 2018-08-11T23:10:46.000
dc.date.accessioned 2020-06-30T02:59:59Z
dc.date.available 2020-06-30T02:59:59Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2015
dc.date.embargo 2001-01-01
dc.date.issued 2015-01-01
dc.description.abstract <p>This study investigated the processing-structure-properties relationships in an Al/Ca composites using both experiments and modeling/simulation. A particular focus of the project was understanding how the strength and electrical conductivity of the composite are related to its microstructure in the hope that a conducting material with light weight, high strength, and high electrical conductivity can be developed to produce overhead high-voltage power transmission cables. The current power transmission cables (e.g., Aluminum Conductor Steel Reinforced (ACSR)) have acceptable performance for high-voltage AC transmission, but are less well suited for high-voltage DC transmission due to the poorly conducting core materials that support the cable weight. This Al/Ca composite was produced by powder metallurgy and severe plastic deformation by extrusion and swaging. The fine Ca metal powders have been produced by centrifugal atomization with rotating liquid oil quench bath, and a detailed study about the atomization process and powder characteristics has been conducted. The microstructure of Al/Ca composite was characterized by electron microscopy. Microstructure changes at elevated temperature were characterized by thermal analysis and indirect resistivity tests. The strength and electrical conductivity were measured by tensile tests and four-point probe resistivity tests. Predicting the strength and electrical conductivity of the composite was done by micro-mechanics-based analytical modeling. Microstructure evolution was studied by mesoscale-thermodynamics-based phase field modeling and a preliminary atomistic molecular dynamics simulation. The application prospects of this composite was studied by an economic analysis. This study suggests that the Al/Ca (20 vol. %) composite shows promise for use as overhead power transmission cables. Further studies are needed to measure the corrosion resistance, fatigue properties and energized field performance of this composite.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/etd/14901/
dc.identifier.articleid 5908
dc.identifier.contextkey 8436168
dc.identifier.doi https://doi.org/10.31274/etd-180810-4499
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath etd/14901
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/29085
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/etd/14901/Tian_iastate_0097E_15115.pdf|||Fri Jan 14 20:28:35 UTC 2022
dc.subject.disciplines Engineering
dc.subject.disciplines Materials Science and Engineering
dc.subject.disciplines Mechanics of Materials
dc.subject.keywords Materials Science and Engineering
dc.subject.keywords Composite
dc.subject.keywords Conductor
dc.subject.keywords high strength
dc.subject.keywords high voltage
dc.subject.keywords lightweight
dc.subject.keywords power transmission
dc.title Structure-property relationships in an Al matrix Ca nanofilamentary composite conductor with potential application in high-voltage power transmission
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication bf9f7e3e-25bd-44d3-b49c-ed98372dee5e
thesis.degree.discipline Materials Science and Engineering
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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