A Microstructural and Damage Investigation into the Low Temperature Impact Behavior of an HSLA Steel

dc.contributor.advisorBardelcik, Alexander
dc.contributor.authorWu, Siyu
dc.date.accessioned2019-09-04T14:37:55Z
dc.date.available2019-09-04T14:37:55Z
dc.date.copyright2019-07
dc.date.created2019-08-28
dc.date.issued2019-09-04
dc.degree.departmentSchool of Engineeringen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Applied Scienceen_US
dc.degree.programmeEngineeringen_US
dc.description.abstractStelco, a Canadian steel making company produced a hot rolled coil of a G40.21 50WT High Strength Low Alloy (HSLA) steel. The material needed to meet a demanding Drop Weight Tear Test (DWTT) specification at -35℃. The coils produced using a coiling temperature of 540℃ did not meet the DWTT specification with mixed pass/fail results. A second coil produced using a coiling temperature of 500℃ met the DWTT specification, but still with mixed results. To investigate this, a two-part study was undertaken. The first part investigated the effect of coiling temperature on the microstructure and CVN impact behavior. It was found that 540℃ coiling temperature resulted in a coarser grain size but less initial void/inclusion content. Furthermore, CVN testing showed that the material coiled at 540℃ had better impact toughness. The second part investigated the mixed pass/fail results for the DWTT and CVN tests conducted at -35℃ for the material coiled at 500℃. The results showed that there were no obvious differences between the pass and failed specimen in terms of microstructure, initial porosity, damage evolution and impact testing behavior, which suggests that the test temperature of -35℃ was within the ductile-brittle transition of this material.en_US
dc.identifier.urihttp://hdl.handle.net/10214/17362
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectEngineeringen_US
dc.subjectSteelen_US
dc.titleA Microstructural and Damage Investigation into the Low Temperature Impact Behavior of an HSLA Steelen_US
dc.typeThesisen_US

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