The isothermal deformation of nickel aluminum bronze in relation to friction stir processing

dc.contributor.advisorMcNelley, Terry R.
dc.contributor.authorPierce, Frank Allen
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentMechanical and Astronautical Engineering (MAE)
dc.dateJune 2004
dc.date.accessioned2012-03-14T17:30:55Z
dc.date.available2012-03-14T17:30:55Z
dc.date.issued2004-06
dc.description.abstractThe extreme strain, strain rate and temperature gradients during Friction Stir Processing (FSP) render measurement of key parameters in the stir zone infeasible with common methods. The objective of this research was to separate the effects that temperature and deformation in an experimental study of the microstructure and mechanical properties of Ni-AL bronze (NAB). This was accomplished by subjecting as-cast NAB material to several isothermal annealing and quenching treatments as well as isothermal hot rolling processes. Sufficient material was generated to provide results and data for subsequent optical microscopy, tensile, & hardness tests. All results were then compared to similar data collected from previous works completed here at Naval Postgraduate School and with other DARPA FSP program participants. During the course of this work correlations were drawn between FSP material and the material subjected to isothermal hotworking, which may enhance our understanding of the roles that various FSP process parameters have on the microstructural transformation sequence within this material. The hot-rolling study conducted here suggests that FSP process parameters leading to severe deformation at temperatures between 950-1000 C in the NAB material provides high ductility (elongation approximately 28%) with moderate strengths.en_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.
dc.description.serviceLieutenant, United States Coast Guarden_US
dc.description.urihttp://archive.org/details/theisothermaldef109451210
dc.format.extentxiv, 55 p. : ill.en_US
dc.identifier.urihttps://hdl.handle.net/10945/1210
dc.publisherMonterey, California, Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.subject.authorFriction stir processingen_US
dc.subject.authorNickel-aluminum bronzeen_US
dc.subject.authorNABen_US
dc.subject.authorIsothermal deformationen_US
dc.subject.authorAnnealingen_US
dc.subject.authorOptical microscopyen_US
dc.subject.authorNaval propellersen_US
dc.subject.authorSurface treatmenten_US
dc.subject.authorThermomechanically affected zoneen_US
dc.subject.authorShear deformationen_US
dc.subject.authorHomogenization of microstructureen_US
dc.subject.authorGrain refinementen_US
dc.subject.lcshAluminumen_US
dc.titleThe isothermal deformation of nickel aluminum bronze in relation to friction stir processingen_US
dc.typeThesisen_US
dspace.entity.typePublication
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgreaduate Schoolen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.nameM.S. in Mechanical Engineeringen_US
etd.verifiednoen_US
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