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TECHNICAL PAPERS

Study of Nonuniform In-Plane and In-Depth Residual Stress of Friction Stir Welding

[+] Author and Article Information
Min Ya, Fulong Dai

Department of Engineering Mechanics, Tsinghua University, Beijing, 100084 China

Jian Lu

LASMIS, Université de Technologié de Troyes, 10010 Troyes, France

J. Pressure Vessel Technol 125(2), 201-208 (May 05, 2003) (8 pages) doi:10.1115/1.1545767 History: Received January 29, 2002; Revised November 25, 2002; Online May 05, 2003
Copyright © 2003 by ASME
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References

Dawes, C. J., 1995, “An Introduction to Friction Stir Welding and its Development,” Mental Fabrication, Vol. 1, pp. 13–16.
Thomas,  W. M., and Nicholas,  E. D., 1997, “Friction Stir Welding for the Transportation Industries,” Mater. Des., 16(4/6), pp. 269–273.
Shinoda,  T., and Kondo,  Y., 1997, “Friction Stir Welding of Aluminum Plate,” Welding International, 11 (3), pp. 179.
Dawes,  C. J., and Thomas,  W. M., 1996, “Friction Stir Process Welds Aluminum Alloys,” Weld. J. (Miami), 75(3), pp. 41–45.
Lu, J. Edit, Editorial Board, James, M., Lu, J., and Roy, G., 1996, Handbook of Measurement of Residual Stresses, The Fairmont Press, INC.
Warren, B. E., 1969, X-ray Diffraction, Addison-Wesley, Reading, MA.
Nakayama,  Y., Takaai,  T., and Kimura,  S., 1993, “Evaluation of Surface Residual Stresses in Cold-rolled 5083 Aluminum Alloy by X-ray Method,” Mater. Trans., JIM, 34(6), pp. 496–503.
Allen,  A. J., Hutchings,  M. T., Windsor,  C. G., and Andreani,  C., 1985, “Neutron Diffraction Method for the Study of Residual Stress Fields,” Adv. Phys., 34(4), pp. 445–473.
Ueda,  Y., and Fukuda,  K., 1980, “New Measuring Method of Three Dimensional Welding Residual Stresses Based on Newly Proposed Principle of Inherent Strain,” Naval Architecture and Engineering, 18 , pp. 146–163
Ueda,  Y., and Fukuda,  K., 1989, “New Measuring Method of Three Dimensional Residual Stresses in Long Welded Joints Using Inherent Strains as Parameters-lz Method,” J. Mater. Tech.,111, pp. 1–8.
Mathar,  J., 1934, “Determination of Initial Stresses by Measuring the Deformations around Drilled Holes,” Trans. ASME, 56, pp. 249–254.
Rendler,  N. J., and Vigness,  I., 1966, “Hole-drilling Strain-Gage Method of Measuring Residual Stresses,” Exp. Mech., 6(12), pp. 577–586.
Niku-Lari,  A., Lu,  J., and Flavenot,  J. F., 1985, “Measurement of Residual Stress Distribution by the Incremental Hole Drilling Method,” Exp. Mech., 25(2), pp. 175–185.
Flaman,  M. T., and Manning,  B. H., 1985, “Determination of Residual Stress Variation with Depth by the Hole-drilling Method,” Exp. Mech., 25(3), pp. 205–207.
Lu,  J., and Flavenot,  J. F., 1989, “Applications of the Incremental Hole-drilling Method for Measurements of Residual Stress Distribution,” Exp. Tech., 13(11), pp. 18–24.
Schajer,  G. S., 1988, “Measurement of Non-uniform Residual Stresses using the Hole Drilling Method, Part I—Stresses Calculation Procedures,” ASME J. Eng. Mater. Technol., 10(4), pp. 338–343.
Schajer,  G. S., 1988, “Measurement of Non-uniform Residual Stresses using the Hole Drilling Method, Part II—Practical Applications of the Integral Method,” ASME J. Eng. Mater. Technol., 10(4), pp. 344–349.
Wu,  Z., Lu,  J., and Han,  B., 1998, “Study of Residual Stress Distribution by a Combined Method of Moiré Interferometry and Incremental Hole-drilling—Part I, Theory,” ASME J. Appl. Mech., 65(9), pp. 837–843.
Wu,  Z., Lu,  J., and Han,  B., 1998, “Study of Residual Stress Distribution by a Combined Method of Moiré Interferometry and Incremental Hole-drilling—Part II, Implementation,” ASME J. Appl. Mech., 65(9), pp. 844–850.
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Figures

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Relaxation of local residual stresses
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Surface displacement fields due to normal nodal forces acting on two adjacent elements of boundary of the hole in the first 0.1 mm layer
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Surface displacement fields due to shear nodal forces acting on two adjacent elements of boundary of the hole in the first 0.1 mm layer
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Crown surface of the friction stir weld aluminum plate
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A schematic diagram of the root surface of the friction stir weld specimen and the position of the drilled holes  
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Optical and mechanical setup of the Moiré interferometry and hole-drilling system
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Typical Moiré fringes of four holes at depth of 0.4 mm—(a) hole 1 depth=0.4 mm, (b) hole 2 depth=0.4 mm, (c) hole 3 depth=0.4 mm (d) hole 4 depth=0.4 mm
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Magnified view of Ux field—(a) hole 1 depth=0.7 mm, (b) hole 2 depth=0.7 mm
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Residual stress distribution at various depths of four regions around hole 2—(a) region R1, (b) region R2, (c) region R3, (d) region R4
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Residual stress distribution in transversal direction and at various depths of FSW specimen—(a) longitudinal residual stress, (b) transversal residual stress
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Comparison of residual stress results determined from FSW specimen in region R3 and A, region R4 and B by MIIHDM and integral strain gauge hole-drilling method

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