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Study of the Effect of Hot Rolling Processing Parameters on the Variability of HSLA Steels

Garcia Gonzalez, Jose Enrique (2002) Study of the Effect of Hot Rolling Processing Parameters on the Variability of HSLA Steels. Master's Thesis, University of Pittsburgh.

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    Abstract

    The effect of different hot mill processing parameters and their influence on the variability of mechanical properties of HSLA steels has been studied. This work presents an analysis of the relative contribution of the different hot mill processing parameters to the variability of HSLA steels. The experimental design includes variation of Reheating, Roughing, Finishing, and Coiling temperatures, as well as Cooling Rate through the austenite to ferrite transformation, and from coiling to room temperature. The variation in finishing and coiling temperature results in an average variation of 12% in mechanical properties. The variation of the cooling rate, through the austenite to ferrite transformation, and from coiling to room temperature, has the largest impact on the variability of microstructure and properties. A correlation between the various microstructural features, dislocation densities and precipitation behavior, with mechanical properties is presented.


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    Item Type: University of Pittsburgh ETD
    ETD Committee:
    ETD Committee TypeCommittee MemberEmail
    Committee ChairDeArdo, Anthony Jdeardo@engr.pitt.edu
    Committee CoChairGarcia, Calixto Igarcia@engr.pitt.edu
    Committee MemberNettleship, Iannettles@pitt.edu
    Title: Study of the Effect of Hot Rolling Processing Parameters on the Variability of HSLA Steels
    Status: Unpublished
    Abstract: The effect of different hot mill processing parameters and their influence on the variability of mechanical properties of HSLA steels has been studied. This work presents an analysis of the relative contribution of the different hot mill processing parameters to the variability of HSLA steels. The experimental design includes variation of Reheating, Roughing, Finishing, and Coiling temperatures, as well as Cooling Rate through the austenite to ferrite transformation, and from coiling to room temperature. The variation in finishing and coiling temperature results in an average variation of 12% in mechanical properties. The variation of the cooling rate, through the austenite to ferrite transformation, and from coiling to room temperature, has the largest impact on the variability of microstructure and properties. A correlation between the various microstructural features, dislocation densities and precipitation behavior, with mechanical properties is presented.
    Date: 20 December 2002
    Date Type: Completion
    Defense Date: 22 November 2002
    Approval Date: 20 December 2002
    Submission Date: 03 December 2002
    Access Restriction: No restriction; Release the ETD for access worldwide immediately.
    Patent pending: No
    Institution: University of Pittsburgh
    Thesis Type: Master's Thesis
    Refereed: Yes
    Degree: MSMSE - Master of Science in Materials Science and Engineering
    URN: etd-12032002-161350
    Uncontrolled Keywords: APFIM; Clusters; Cooling Rate; Dislocation Density; Ferrite; Hot Rolling; HSLA steel; HSM Simulation; Nb-V steel; Precipitation Hardening; Strengthening Mechanisms; Variability
    Schools and Programs: Swanson School of Engineering > Materials Science and Engineering
    Date Deposited: 10 Nov 2011 15:07
    Last Modified: 16 May 2012 11:57
    Other ID: http://etd.library.pitt.edu:80/ETD/available/etd-12032002-161350/, etd-12032002-161350

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