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Evolution of Microstructure in Nb-Bearing Microalloyed Steels Produced by the Compact Strip Production Process

Ruiz-Aparicio, Arturo (2004) Evolution of Microstructure in Nb-Bearing Microalloyed Steels Produced by the Compact Strip Production Process. Master's Thesis, University of Pittsburgh. (Unpublished)

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New steel processing technologies require an in-depth understanding of the processing-microstructure-property synergism of current and future steels. The need for this basic understanding is to improve the properties of the steels and to make them commercially more competitive. This study systematically examines the microstructure evolution in the as-cast and as-equilibrated conditions of two low-carbon Nb-bearing microalloyed HSLA steels commercially produced by the Compact Strip Production (CSP) process. Particular attention is paid to the precipitation that takes place through the processing conditions studied in this work. The formation of complex (Nb, Ti)(C, N) precipitates with a "star-like" shape was the primary type of precipitates found. The kinetics of formation and dissolution of the star-like precipitates at different re-heating temperatures is examined. A comparison between the as-cast, as-equilibrated and hot band conditions is also presented.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Ruiz-Aparicio, Arturoarr19@pitt.eduARR19
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairDeArdo, A Jdeardo@engr.pitt.eduDEARDO
Committee CoChairGarcia, C Igarcia@engr.pitt.eduCIGARCIA
Committee MemberPhule, Pphule@engr.pitt.eduPPP
Date: 13 September 2004
Date Type: Completion
Defense Date: 14 May 2004
Approval Date: 13 September 2004
Submission Date: 19 May 2004
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Materials Science and Engineering
Degree: MSMSE - Master of Science in Materials Science and Engineering
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: austenite grain size; equalizing furnace; Microalloying; SDAS
Other ID:, etd-05192004-133025
Date Deposited: 10 Nov 2011 19:45
Last Modified: 19 Dec 2016 14:36


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