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dc.contributor.advisorPerkins, Jeff
dc.contributor.authorHolsten, Guy Victor
dc.dateJune 1990
dc.date.accessioned2013-02-15T23:11:43Z
dc.date.available2013-02-15T23:11:43Z
dc.date.issued1990-06
dc.identifier.urihttp://hdl.handle.net/10945/27758
dc.description.abstractThe transformation behavior of aged Mn-Cu-based alloys was studied via transmission electron microscopy. The evolution of several unique forms of diffraction contrast, such as 'tweed' and 'flickering', was characterized and correlated with the underlying transformation behavior. Convergent beam microbeam compositional analysis and high resolution lattice imaging techniques were employed to assist in the interpretations. It was determined that upon aging these alloys, a FCC solid solution decomposes into a fine dispersion of Mn-rich and Mn-poor regions which coarsen with further aging. This decomposition was modeled using finite difference techniques. The Mn-rich regions were determined to undergo a crystallographic transformation which involves a slight tetragonal distortion upon cooling. For short aging times, when the elastic strain fields around each of the finely dispersed FCT regions overlap sufficiently, tweed contrast is observed.en_US
dc.description.urihttp://archive.org/details/phasetransformat1094527758
dc.format.extentvi, 93 p. ill.en_US
dc.languageen_US
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.lcshAlloys.en_US
dc.titlePhase transformations and microstructural evolution in aged Mn-Cu-based alloysen_US
dc.typeThesisen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentMechanical Engineering
dc.subject.authorHigh Damping Alloysen_US
dc.subject.authorSpinodal Decompositionen_US
dc.subject.authorCu-Mn alloysen_US
dc.subject.authorFlickeringen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Mechanical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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