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dc.contributor.advisorClark, John R.
dc.contributor.authorHornbeck, Parker Britten
dc.descriptionApproved for public release; distribution unlimited.en_US
dc.description.abstractPrecession patterns taken with carefully monobromated radiation show that stacking faults are present in aluminum crystals grown by the strain anneal method. The evidence for the stacking faults are the streaks through some diffraction peaks, the variation in structure factors, Fhkl, as determined from the relative intensities, and the doubling of some peaks. Arguments are advanced, on geometrical grounds, that if stacking faults exist in the crystal they will combine to produce regions in twin orientation. However, the absence of systematic "extra- twin diffraction peaks suggests that the twinned regions are very small. It is suggested that a low stacking fault energy and the occurrence of stacking faults on all stacking planes, together with the creation of substructures with other than twin orientations, explains the absence of large visible twins.en_US
dc.publisherMonterey, California. U.S. 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.titleTwinning dislocations in aluminum.en_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Material Scienceen_US
etd.thesisdegree.disciplineMaterials Scienceen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US

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