SLS Production Friction Stir Plugs by Additive Friction Stir Deposition Aluminum 2219

Simple item page
dc.contributorBarkey, Mark
dc.contributorKasemer, Matthew
dc.contributorSowards, Jeffrey
dc.contributor.advisorDaniewicz, Steve
dc.contributor.advisorAmaro, Robert
dc.contributor.authorAnderson, Kathryn
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2021-11-23T14:33:59Z
dc.date.available2021-11-23T14:33:59Z
dc.date.issued2021
dc.descriptionElectronic Thesis or Dissertationen_US
dc.description.abstractThe self-reacting friction stir welding (SR-FSW) method is extensively used in NASA’s current generation rocket, the Space Launch System (SLS). The initialization and termination of welds created by the SR-FSW process produce holes resulting from the removal of the weld tool assembly. These holes must subsequently be filled by the use of a separate process. These holes pose a mission-critical engineering challenge in the production of the SLS rocket. The current method for sealing the holes is the Friction Pull Plug Welding (FPPW) process, where a conical piece of material is spun and plunged into the remaining hole. The solid-state additive friction stir-deposition (AFS-D) process can create pull plugs with tailored microstructures that can increase the reliability of the current FPPW method.This work furthers the understanding of using AFS-D AA2219 material as a replacement for the material currently being used in the FPPW method. The impacts of this research are as follows: 1. The ability for NASA to predict the deformation response of AFS-D AA2219 material produced by any process parameter set intended for use in the SLS 2. An understanding of the effects of the AFS-D process on AFS-D AA2219, including deformation response, precipitation hardening effects, and cyclic material properties 3. An increased reliability in the plug/plate assembly because of more consistent properties between the base material and FPPW, enabling the SLS to fly. This is achieved through the creation and calibration of a micromechanical model that captures the effects of microstructure on the deformation response of AFS-D pull plugs as a function of the manufacturing process parameters. Ultimately, this work will provide the SLS engineering team with the necessary information to support a change in the FPPW process which will reduce the time of construction by mitigating the need for FPPW repairs.en_US
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.otherhttp://purl.lib.ua.edu/181473
dc.identifier.otheru0015_0000001_0003912
dc.identifier.otherAnderson_alatus_0004D_14508
dc.identifier.urihttp://ir.ua.edu/handle/123456789/8144
dc.languageEnglish
dc.language.isoen_US
dc.publisherUniversity of Alabama Libraries
dc.relation.hasversionborn digital
dc.relation.ispartofThe University of Alabama Electronic Theses and Dissertations
dc.relation.ispartofThe University of Alabama Libraries Digital Collections
dc.rightsAll rights reserved by the author unless otherwise indicated.en_US
dc.titleSLS Production Friction Stir Plugs by Additive Friction Stir Deposition Aluminum 2219en_US
dc.typethesis
dc.typetext
etdms.degree.departmentUniversity of Alabama. Department of Mechanical Engineering
etdms.degree.disciplineMechanical Engineering
etdms.degree.grantorThe University of Alabama
etdms.degree.leveldoctoral
etdms.degree.namePh.D.

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
u0015_0000001_0003912.pdf
Size:
9.14 MB
Format:
Adobe Portable Document Format
Download

Collections

Theses and Dissertations
Theses and Dissertations - Department of Mechanical Engineering