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dc.contributor.advisorFox, Alan G.
dc.contributor.authorSuka, Akira
dc.dateJune 1992
dc.date.accessioned2012-11-29T16:18:42Z
dc.date.available2012-11-29T16:18:42Z
dc.date.issued1992-06
dc.identifier.urihttps://hdl.handle.net/10945/23957
dc.description.abstractThe microstructure and mechanical properties of highly welda ble high copper HSLA-100 steel in two-inch (50 mm) plate form were investigated in this work. The mechanical property data showed that the steel in the as-quenched and aged conditions not only met the mechanical property specifications of the Navy for HSLA (HY) 100 steels but also satisfied the requirements for HY-130 steels. Optical, scanning and transmission electron microscope studies of the as-quenched plate indicated that the microstructure was a mixture of lath martensite/retained austenite and bainitic ferrite, which is typical of these steels. On aging this microstructure developed the tempered structures usually encountered in HSLA steels. This investigation concludes that: Increased copper HSLA steel meets all the mechanical property specifications of Navy HSLA-100 ksi yield strength steel regardless of heat treatment and plate thickness (up to 50 mm thickness). High copper HSLA-100 steel in 50 mm plate form can fulfill all the mechanical property requirements of Navy 130 ksi yield strength steel with an appropriate temper. The microstructures formed with various heat treatments are consistent with the HSLA-100 CCT diagram. Increasing copper in HSLA-100 steel also increases the toughness as well as the strength, though the dynamics of this process is not clear.en_US
dc.description.urihttp://archive.org/details/microstructurend1094523957
dc.format.extent54 p.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsCopyright is reserved by the copyright owneren_US
dc.titleMicrostructure and mechanical properties of high copper HSLA-100 steel in 2-inch plate formen_US
dc.typeThesisen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentMechanical Engineering
dc.subject.authorSteelen_US
dc.subject.authorHigh copper HSLA-100 steelen_US
dc.subject.authorMechanical propertyen_US
dc.subject.authorMicrostructureen_US
dc.description.serviceLieutenant, Maritime Self-Defense Force of Japanen_US
etd.thesisdegree.nameM.S. in Engineering Scienceen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineEngineering Scienceen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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