Title:
MULTISCALE CHARACTERIZATION OF ΑLPHA-BETA TITANIUM ALLOYS USING HIGH THROUGHPUT SPHERICAL INDENTATION TEST PROTOCOLS

dc.contributor.advisor Kalidindi, Surya R.
dc.contributor.author Millan Espitia, Natalia
dc.contributor.committeeMember McDowell, David L.
dc.contributor.committeeMember Garmestani, Hamid
dc.contributor.committeeMember Neu, Richard W.
dc.contributor.committeeMember Pilchak, Adam L.
dc.contributor.department Mechanical Engineering
dc.date.accessioned 2022-01-14T16:11:04Z
dc.date.available 2022-01-14T16:11:04Z
dc.date.created 2021-12
dc.date.issued 2021-12-15
dc.date.submitted December 2021
dc.date.updated 2022-01-14T16:11:04Z
dc.description.abstract Traditionally, new materials follow well stablished paths from their manufacturing beginnings to their final application. Development, evaluation, certification and deployment are some of the steps in these processes. However, some of these stages are characterized for very specialized protocols, resulting in prolonged timelines from beginning to end. The design process of materials can sometimes be defined as ambiguous due to the lack of fundamental knowledge at salient length-scales. This can be attributed to the absence of trustworthy testing methods that provide meaningful and reliable knowledge on the behavior of materials at length-scales over different orders of magnitude. In addition to this characteristic, cost and time efficiency are also crucial attributes in the materials design field, as large amounts of data covering wide ranges or parameters provide stronger bases for physics-based models that can reverse-engineer the whole process. The work presented here, evaluates spherical nano-indentation protocols as a high-throughput approach for the mechanically characterization of several α- and α/β titanium alloys at the grain-scale level. We start by the exploring the mechanical response of primary-α grains, and their dependence on the HCP lattice orientation and the corresponding grain chemical composition. Next, we move into the mechanical behavior of single grains in fully basket-weave titanium microstructures. By looking into the grain responses, a reduction on the multiple microstructural features in this type of morphologies is accomplished, leading to better statements of the influence of lath-microstructure and α-lath orientations on the indentation properties. This work is accompanied by a thorough microstructural characterization/quantification of the basket-weave morphology that is later subjected to a dimensionality reduction for a simplified understanding. And finally, we aim to bridge multiresolution indentation measurements form a bimodal titanium microstructure for the subsequent evaluation of composite theories in the prediction of the effective indentation yield.
dc.description.degree Ph.D.
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/66138
dc.language.iso en_US
dc.publisher Georgia Institute of Technology
dc.subject Titanium Alloys
dc.subject Spherical Indentation
dc.subject Mechanical Characterization
dc.subject Microstructure Characterization
dc.subject Crystal Anisotropy
dc.subject HCP Crystal Lattice
dc.subject Indentation Stress-Strain Curves
dc.subject High-Throughput Testing
dc.title MULTISCALE CHARACTERIZATION OF ΑLPHA-BETA TITANIUM ALLOYS USING HIGH THROUGHPUT SPHERICAL INDENTATION TEST PROTOCOLS
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Kalidindi, Surya R.
local.contributor.corporatename George W. Woodruff School of Mechanical Engineering
local.contributor.corporatename College of Engineering
relation.isAdvisorOfPublication e5ad79b6-4761-4f35-86c3-0890d432fe44
relation.isOrgUnitOfPublication c01ff908-c25f-439b-bf10-a074ed886bb7
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
thesis.degree.level Doctoral
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