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TECHNICAL PAPERS

The Effect of Prior Cold Work on Tensile Residual Stress Development in Nuclear Weldments

[+] Author and Article Information
Douglas J. Hornbach, Paul S. Prevéy

Lambda Research, Cincinnati, OH 45227

J. Pressure Vessel Technol 124(3), 359-365 (Jul 26, 2002) (7 pages) doi:10.1115/1.1481035 History: Received January 18, 2001; Revised March 29, 2002; Online July 26, 2002
Copyright © 2002 by ASME
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References

Figures

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Alloy 600 50-deg heater sleeve penetration J-weld mockup specimen geometry with entire mockup and close-up of measurement locations shown
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Empirical relationship between (311) peak width and cold working (true plastic strain) for Alloy 600 and Alloy 718
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True stress-strain curve for Alloy 600 heater sleeve material removed from service
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Three-point bend setup for Alloy 718 beam samples
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True stress-strain curve for aged Alloy 718 three-point bend beam material
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Baseline subsurface axial and circumferential residual stress for drawn and reamed Alloy 600 sleeve removed from service
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Subsurface cold work (true plastic strain) and yield strength distributions, demonstrating a marked increase in yield strength in the surface layer, for baseline drawn and reamed Alloy 600 sleeve removed from service
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Variation in cold work (true plastic strain) and yield strength with axial position on the inside diameter low angle side, of the Alloy 600 J-weld mockup sleeve
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Variation in axial and circumferential residual stress with axial displacement and depth on the low angle side of the Alloy 600 J-weld mockup sleeve show stresses in excess of the SCC threshold
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Subsurface residual stress, cold work and yield strength distributions in baseline region of shot peened and LPB 3-point bend Alloy 718 beam samples
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XRD surface residual stress variation with plastic strain imposed by three-point bending on convex side of Alloy 718 beam samples
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Comparison of XRD surface residual stress before and after tensile plastic deformation of Alloy 718 beam samples showing an inversion from compression to tension on highly cold worked shot peened sample
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Comparison of X-ray and FE surface results on electropolished, LPB and shot peened Alloy 718 three-point bend samples

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