Characterization of Ti-6Al-4V Produced Via Electron Beam Additive Manufacturing

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In recent years, additive manufacturing (AM) has become an increasingly promising method used for the production of structural metallic components. There are a number of reasons why AM methods are attractive, including the ability to produce complex geometries into a near-net shape and the rapid transition from design to production. Ti-6Al-4V is a titanium alloy frequently used in the aerospace industry which is receiving considerable attention as a good candidate for processing via electron beam additive manufacturing (EBAM). The Sciaky EBAM method combines a high-powered electron beam, weld-wire feedstock, and a large build chamber, enabling the production of large structural ... continued below

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viii, 65 pages : illustrations (some color)

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Hayes, Brian J. December 2015.

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This thesis is part of the collection entitled: UNT Theses and Dissertations and was provided by UNT Libraries to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 135 times , with 13 in the last month . More information about this thesis can be viewed below.

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  • Hayes, Brian J.

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Description

In recent years, additive manufacturing (AM) has become an increasingly promising method used for the production of structural metallic components. There are a number of reasons why AM methods are attractive, including the ability to produce complex geometries into a near-net shape and the rapid transition from design to production. Ti-6Al-4V is a titanium alloy frequently used in the aerospace industry which is receiving considerable attention as a good candidate for processing via electron beam additive manufacturing (EBAM). The Sciaky EBAM method combines a high-powered electron beam, weld-wire feedstock, and a large build chamber, enabling the production of large structural components. In order to gain wide acceptance of EBAM of Ti-6Al-4V as a viable manufacturing method, it is important to understand broadly the microstructural features that are present in large-scale depositions, including specifically: the morphology, distribution and texture of the phases present. To achieve such an understanding, stereological methods were used to populate a database quantifying key microstructural features in Ti-6Al-4V including volume fraction of phases, a lath width, colony scale factor, and volume fraction of basket weave type microstructure. Microstructural features unique to AM, such as elongated grains and banded structures, were also characterized. Hardness and tensile testing were conducted and the results were related to the microstructural morphology and sample orientation. Lastly, fractured surfaces and defects were investigated. The results of these activities provide insight into the process-structure-properties relationships found in EBAM processed Ti-6Al-4V.

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viii, 65 pages : illustrations (some color)

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UNT Theses and Dissertations

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  • December 2015

Added to The UNT Digital Library

  • March 20, 2016, 10:34 a.m.

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  • May 24, 2017, 7:56 a.m.

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Citations, Rights, Re-Use

Hayes, Brian J. Characterization of Ti-6Al-4V Produced Via Electron Beam Additive Manufacturing, thesis, December 2015; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc822771/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .