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TECHNICAL PAPERS

Nondestructive Monitoring of Stress Relaxation in Welded Steel Plates

[+] Author and Article Information
Brent H. Chance, Don E. Bray

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77841

J. Pressure Vessel Technol 124(3), 343-348 (Jul 26, 2002) (6 pages) doi:10.1115/1.1491581 History: Received May 02, 2002; Online July 26, 2002
Copyright © 2002 by ASME
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References

Timoshenko, S. P., and Goodier, J. N., 1987, Theory of Elasticity, Third Edition, McGraw-Hill, Inc., New York, NY, p. 8.
Dieter, G. E., 1976, Mechanical Metallurgy, Second Edition, McGraw-Hill, New York, NY.
Adeyemi,  M. B., Modlen,  G. F., and Stark,  R. A., 1983, “Stress Relaxation in Cold Worked Steel,” Met. Sci., 17, No. 7, July, pp. 309–315.
Moffat, W. H., 1951, “An Investigation of Residual Stress in Welded Joints,” M.S. thesis, Texas A&M University, College Station, TX.
Chance, B. H., 2000, “Ultrasonic Measurement of Residual Stress Relaxation in Welded Steel Plates Using Critically Refracted Longitudinal Waves,” M.S. thesis, Texas A&M University, College Station, TX.
Bray, D. E., and Stanley, R. K., 1997, Nondestructive Evaluation, CRC Press, Boca Raton, FL, pp. 66, 68, 148–168.
Bray,  D. E., and Tang,  W., 2001, “Subsurface Stress Evaluation in Steel Plates and Bars Using the LCR Ultrasonic Wave,” Nucl. Eng. Des., 207, pp. 231–240.
Askeland, D. R., 1994, The Science and Engineering of Materials, Third Edition, PWS Publishing, Boston, MA, pp. 198, 339–340.
Leon-Salamanca,  T., and Bray,  D. E., 1996, “Residual Stress Measurement in Steel Plate and Welds Using Critically Refracted Longitudinal Waves (LCR),” Res. Nondestruct. Eval., 7, No. 4, pp. 77–85.

Figures

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Comparison of present data and Dieter model 2
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Comparison of Moffat 4 data and Dieter model 2
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Stress relaxation curves for Moffat 4 (lower curve, right-hand axis) and present data (upper curve, left axis)
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Strain gage indicated stress (upper plot, left axis) and normalized travel times (lower plot, right axis); probes A and B
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Normalized travel time and time after the weld was cut using only the hydraulic ram (probe A only).
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Normalized travel time and time after the weld was cut, probes A and B
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Time after the weld was cut and the average stress calculated from strain gages for all plates
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Schematic of the sender-receiver probe assembly
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Longitudinal section through midsection of bridge showing layout of probe interrogation distance, d, bridge length, l, and strain gage location
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Example plate (unwelded)

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