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dc.contributor.advisorFox, Alan G.
dc.contributor.authorDouglas, Brent A.
dc.dateDecember 1989
dc.date.accessioned2013-01-23T22:09:59Z
dc.date.available2013-01-23T22:09:59Z
dc.date.issued1989-12
dc.identifier.urihttp://hdl.handle.net/10945/27164
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.abstractThe U.S. Navy is currently funding a program for certification of HSLA steels to replace the HY series of high strength steels for structural fabrication. Integral to this program is the certification of welding consumables for use with these steels. The size, distribution and composition of nonmetallic inclusions in HSLA steel weld metal has been shown to play a key role in the final strength and toughness of the deposited weld. The purpose of this study was to develop a procedure for analysis of nonmetallic inclusions in HSLA steel multipass weldments utilizing optical microscopy and examination and EDX analysis in a SEM. The results of the study suggest that the mean diameter of inclusions in the final pass of a GMAW weldment in a 2.0 inch HSLA-100 plate is larger than the mean diameter of those in the root pass. Additionally, the inclusion material in the final pass contains a greater amount of Si and Ti deoxidation products than that in the root pass. The larger size, composition and complex structure of the inclusions in the final pass suggest that contain deoxidation products from previous welding passes which have been released through remelting and coalesced into larger inclusionsen_US
dc.description.urihttp://archive.org/details/nonmetallicinclu00doug
dc.format.extent95 p.en_US
dc.language.isoen_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.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.titleNonmetallic inclusions in HSLA steel weldmentsen_US
dc.typeThesisen_US
dc.contributor.secondreaderDutta, Indranath
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentMechanical Engineering
dc.subject.authorNonmetallic inclusionsen_US
dc.subject.authorHSLAen_US
dc.subject.authorWeldingen_US
dc.description.serviceCaptain, United States Marine Corpsen_US
etd.thesisdegree.nameM.S. in Engineering Scienceen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineEngineering Scienceen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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