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TECHNICAL PAPERS

Intensive Quenching Theory and Application for Imparting High Residual Surface Compressive Stresses in Pressure Vessel Components

[+] Author and Article Information
Andrew M. Freborg, B. Lynn Ferguson

Deformation Control Technology, Inc., Cleveland, OH 44130

Michael A. Aronov, Nikolai I. Kobasko, Joseph A. Powell

IQ Technologies, Inc., Akron, OH

J. Pressure Vessel Technol 125(2), 188-194 (May 05, 2003) (7 pages) doi:10.1115/1.1556858 History: Received August 22, 2002; Revised November 26, 2002; Online May 05, 2003
Copyright © 2003 by ASME
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References

Figures

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Effect of cooling rate on probability of cracking
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Martensite formation during quenching—(a) Conventional, (b) Intensive
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Surface stress conditions during intensive quenching
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Surface stress condition during conventional quench
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Surface stress versus time
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Part structure concentric layers
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Finite element model mesh developed for pressure vessel heat treatment evaluation—(a) overview of axisymmetric mesh (b) close-up of closed end illustrating surface mesh refinement
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Time-temperature history for oil quenched pressure vessel section
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Profile of residual hoop stress in pressure vessel cross section after oil quench (units=MPa)
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Time history plot for hoop stress and phase volume fraction for surface and core areas within the pressure vessel during oil quenching
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Time-temperature history for intensively quenched pressure vessel section, illustrating extreme thermal gradient
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Time history plot for stress and phase volume fraction for surface and core areas within the pressure vessel during intensive quenching
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Contour plot of martensite phase volume fraction in the pressure vessel section at the end of intensive quenching
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Profile of residual hoop stress in pressure vessel cross section after intensive quench (units=MPa)
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Comparative stress profiles through the vessel section for both quench scenarios
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Comparative hardness profiles (predicted) for both quench scenarios

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