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dc.contributor.advisorBrewer, Luke N.
dc.contributor.authorBanazwski, Brian J.
dc.dateDecember 2011
dc.date.accessioned2012-08-22T15:33:25Z
dc.date.available2012-08-22T15:33:25Z
dc.date.issued2011-12
dc.identifier.urihttp://hdl.handle.net/10945/10733
dc.description.abstractThis thesis examines the interplay of residual stress distributions caused by welding and laser peening of marine aluminum alloy 5083. Residual stresses at welds in this alloy can cause fatigue and stress corrosion cracking in ship superstructures. X-ray diffraction was used to measure the residual stress distributions across welded and laser peened areas of welded aluminum plate. Full strain and stress tensors were measured and calculated in order to develop a fuller picture of the residual stress distribution in this complex geometry. Electropolishing was used to take residual stresses from specified depth below the surface. The tensor analysis was found to be extremely sensitive to the exact choice of diffraction angles used in the experiment, and an algorithm was developed to optimize the design of the diffraction experiment. Bi-axial stress analysis did show an increase in compressive stress from the laser peening after a couple tenths of a millimeter followed by a gradual decrease in compressive stress as depth increases.en_US
dc.format.extentxviii, 89 p. : col. ill. ; 28 cm.en_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. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.subject.lcshLaser peening.en_US
dc.titleUsing x-ray diffraction to assess residual stresses in laser peened and welded aluminumen_US
dc.contributor.secondreaderMenon, Sarth K.
dc.contributor.departmentMechanical and Astronautical Engineering.
dc.subject.authorX-ray Diffractionen_US
dc.subject.authorResidual Stressesen_US
dc.subject.authorLaser Peeningen_US
dc.subject.authorAA5083;en_US
dc.description.serviceUS Navy (USN) authoren_US
etd.thesisdegree.nameM.S. in Mechanical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate School (U.S.)en_US


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