Microstructure Studies of Ti-6Al-4V Near-Net Shape Structural Components as Prepared by the Arcam Electron Beam Melting Process
| dc.contributor.advisor | J. Michael Rigsbee, Committee Chair | en_US |
| dc.contributor.advisor | Jerome J. Cuomo, Committee Co-Chair | en_US |
| dc.contributor.advisor | John M. Mackenzie, Committee Member | en_US |
| dc.contributor.author | Newell, Andrew Phifer | en_US |
| dc.date.accessioned | 2010-04-02T18:14:42Z | |
| dc.date.available | 2010-04-02T18:14:42Z | |
| dc.date.issued | 2009-07-09 | en_US |
| dc.degree.discipline | Materials Science and Engineering | en_US |
| dc.degree.level | thesis | en_US |
| dc.degree.name | MS | en_US |
| dc.description.abstract | The Arcam electron beam melting (EBM) process is used for rapid prototyping of fully functional metallic parts. Arcam uses electron beam scanning technology similar to a scanning electron microscope to form near-net shape components by selectively melting consecutive finite layers of alloy powder according a 3-D computer-aided design (CAD) file. The Arcam EBM process is being considered as a technology that can produce out-of-production Ti-6Al-4V alloy components for aging aircraft. Two Arcam EBM machines are currently in use at NC state university; the Arcam S12 and the Arcam A2. The microstructures of three samples from preliminary production runswere characterized by optical, scanning electron (SEM), transmission electron (TEM), and scanning transmission electron microscopy (STEM). The microstructures of this limited sample set of as-built solid objects generally consisted of Widmanstatten morphologies of fine acicular alpha laths with retained beta between the alpha phase. Prior beta grain size and volume fraction of retained beta were determined by quantitative metallography. Porosity was found in all samples from both machines due to non-optimization of the processing parameters. | en_US |
| dc.identifier.other | etd-06292009-134446 | en_US |
| dc.identifier.uri | http://www.lib.ncsu.edu/resolver/1840.16/2516 | |
| dc.rights | I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dis sertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. | en_US |
| dc.subject | TEM | en_US |
| dc.subject | titanium | en_US |
| dc.subject | Arcam | en_US |
| dc.title | Microstructure Studies of Ti-6Al-4V Near-Net Shape Structural Components as Prepared by the Arcam Electron Beam Melting Process | en_US |
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