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.
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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Details |
| Item Type: | University of Pittsburgh ETD |
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| ETD Committee: | | ETD Committee Type | Committee Member | Email |
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| Committee Chair | DeArdo, Anthony J | deardo@engr.pitt.edu | | Committee CoChair | Garcia, Calixto I | garcia@engr.pitt.edu | | Committee Member | Nettleship, Ian | nettles@pitt.edu |
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| Title: | Study of the Effect of Hot Rolling Processing Parameters on the Variability of HSLA Steels |
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| Status: | Unpublished |
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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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| Date: | 20 December 2002 |
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| Date Type: | Completion |
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| Defense Date: | 22 November 2002 |
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| Approval Date: | 20 December 2002 |
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| Submission Date: | 03 December 2002 |
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| Access Restriction: | No restriction; Release the ETD for access worldwide immediately. |
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| Patent pending: | No |
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| Institution: | University of Pittsburgh |
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| Thesis Type: | Master's Thesis |
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| Refereed: | Yes |
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| Degree: | MSMSE - Master of Science in Materials Science and Engineering |
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| URN: | etd-12032002-161350 |
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| Uncontrolled Keywords: | APFIM; Clusters; Cooling Rate; Dislocation Density; Ferrite; Hot Rolling; HSLA steel; HSM Simulation; Nb-V steel; Precipitation Hardening; Strengthening Mechanisms; Variability |
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| Schools and Programs: | Swanson School of Engineering > Materials Science and Engineering |
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| Date Deposited: | 10 Nov 2011 15:07 |
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| Last Modified: | 16 May 2012 11:57 |
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| Other ID: | http://etd.library.pitt.edu:80/ETD/available/etd-12032002-161350/, etd-12032002-161350 |
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