The residual stress (RS) in two curved plates cut from a large welded propellant tank for spacecrafts was investigated nondestructively by neutron and laboratory x-ray diffraction. Each plate had two weld beads symmetric to a central monoblock reinforcement. One plate had received a post-weld heat-treatment. The two nondestructive test techniques successfully determined both the bulk (thickness averaged) and the surface stress state, due to the highly different penetration of these radiations in metals. In the as-welded tank, both neutrons and x-rays show a stress level (both in the axial and hoop directions) higher in the heat affected zone (HAZ) than in the weld pool (300 against 160 MPa). A considerable degree of relaxation annealing was observed by neutron diffraction after the application of the heat treatment. In this case, the hoop stress in the HAZ relaxes from about 300 to about 100 MPa. X-rays also permitted the separate determination of the α and β-phase stresses and the calculation of the macro-RS. The latter showed the bending deformation resulting from the cut of the plates from the original tank. The average stress measured by x-rays was found to be very similar to the RS obtained by neutron diffraction technique.
1.
Dunn, B. D., ed., 1997, Metallurgical Assessment of Spacecraft Parts, Materials and Processes-II, Praxis Publishing, Chichester, UK.
2.
Laroze, S., and Barrau J. J., 1991, Mecanique des structures, tome 1, Solides elastiques, plaques et coques, Masson, Paris.
3.
Scardi
, P.
, Leoni
, M.
, Cappuccio
, G.
, Sessa
, V.
, and Terranova
, M. L.
, 1997
, “Residual Stress in Polycrystalline Diamood/Ti-6Al-4V Systems
,” Diamond Relat. Mater.
, 6
, pp. 807
–811
.4.
Ha¨rting
, M.
, and Fritsch
, G.
, 1996
, “Determination of the Residual Stress State in a Natural Titanium Oxide Layer
,” Acta Mater.
, 44
, pp. 487
–492
.5.
Paturaud
, C.
, Farges
, G.
, Sainte Catherine
, M. C.
, and Machet
, J.
, 1998
, “Influence of Particle Energies on the Properties of Magnetron Sputtered Tungsten Films
,” Sur. Coat. Technol.
, 98
, pp. 1257
–1261
.6.
Tsui
, Y. C.
, Doyle
, C.
, and Clyne
, T. W.
, 1998
, “Plasma Sprayed Hydroxyapatite Coatings on Titanium Substrates, Part 1: Mechanical Propertie and Residual Stress Levels
,” Biomaterials
, 19
, pp. 2015
–2029
.7.
Choo
, H.
, Rangaswamy
, P.
, and Bourke
, M. A. M.
, 2000
, “Internal Strain During Heating of Ti-6Al-4V/SCS-6 Composite
,” Scr. Mater.
, 42
, pp. 175
–181
.8.
Hanan
, J. C.
, Swift
, G. A.
, U¨stu¨ndag
, E.
, Beyerlein
, I. J.
, Almer
, J. D.
, Lienert
, U.
, and Haeffner
, D. R.
, 2002
, “Microscale Elastic Strain Evolution Following Damage in Ti-SiC Composites
,” Metall. Mater. Trans. A
, 33
, pp. 3839
–3845
.9.
Evans, A. D., King, A., Pirling, T., Bruno, G., Withers, P. J., and Woodward, C., 2003, “Determination of Residual Stress in Laser Shock Peened Ti-6Al-4V,” Ti-2003-10th World Conference on Titanium, Hamburg, Germany, in press.
10.
Bruno
, G.
, Carrado`
, A.
, Dunn
, B. D.
, Fiori
, F.
, Girardin
, E.
, Pirling
, T.
, and Rustichelli
, F.
, 2000
, “Neutron Diffraction Measurements for the Determination of Residual Stress in Ti6Al4V Welded Plates
,” Mater. Sci. Forum
, 347–349
, pp. 684
–689
.11.
Villars, P., Prince, A., and Okamoto, H., eds., Handbook of Ternary Alloy Phase Diagrams, ASM International, Materials Park, OH.
12.
Ivasishin
, O. M.
, Markowsky
, P. E.
, Matviychuk
, Yu. V.
, and Semiatin
, S. L.
, 2003
, “Precipitation and Recrystallization Behavior of Beta Titanium Alloys during Continuous Heat Treatment
,” Metall. Mater. Trans. A
, 34A
, pp. 147
–158
.13.
ASM Metals Handbook, 1993, vols. 2 and 9, Materials Park, OH.
14.
Bollenrath, F., Fro¨hlich, W., Hauk, V., and Sesemann, H., 1972, “Ro¨ntgenographischen Elastizita¨tskonstanten von Titan und Ti6Al4V,” Z. Metallk.de, 63, pp. 790–801.
15.
Do¨lle, H., and Hauk, V., 1976, “Ro¨ntgenographische Spannungsermittlung fu¨r Eigenspannungssysteme allgemainer Orientierung,” Ha¨rterei Tech. Mitt., 31, pp. 165–168.
16.
Noyar, I. C., and Cohen, J. B., 1987, Residual Stress: Measurement by Diffraction and Interpretation, Springer Verlag, New York.
17.
Cullity, B. D., 1978, Elements of X-Ray Diffraction, Addison and Wesley, Reading, MA, pp. 447–478.
18.
Webster, P. J., 1992, “Spatial Resolution and Strain Scanning,” in Measurement of Residual and Applied Stress Using Neutron Diffraction, M. T. Hutchings and A. D. Krawitz, eds., Kluwer Academics, Dordrecht, The Netherlands.
19.
ASM Metals Handbook, 2000, “Mechanical Testing & Evaluation,” 8, Materials Park, OH.
20.
ASTM Standard E835-94A, 1994, “Standard Test Method for Determining Residual Stresses by the Hole-Drilling Strain Gauge Method,” ASTM, West Conshohocken, PA.
21.
Masubuchi
, K.
, and Martin
, D. C.
, 1961
, “Investigation of Residual Stresses by Use of Hydrogen Cracking
,” Welding Journal (Miami, FL, U. S.)
, 40
, research supplement, pp. 553s–563s
553s–563s
.22.
Masubuchi, K., 1980, Analysis of Welded Structures, Pergamon Press, Oxford, Chap. 6 and 12.
23.
Wohlfahrt, H., 1976, “Schweißeigenspannungen,” HTM Beiheft, 31, pp. 56–71.
24.
Umemoto
, T.
, and Furuya
, S.
, 1989
, “A Simplified Approach to Assess Weld Residual Stress Distribution Through Pipe Wall
,” Nucl. Eng. Des.
, 111
, pp. 159
–171
.25.
Basavaraju
, C.
, 2000
, “Simplified Analysis of Shrinkage in Pipe to Pipe Butt Welds
,” Nucl. Eng. Des.
, 197
, pp. 239
–247
.26.
Bruno, G., and Dunn, B. D., 2004, “Texture of α and β Phases in Ti6Al4V Welded Aerospace Tanks,” in progress.
27.
Taylor, J. R., 1982, An Introduction to Error Analysis: The Study of Uncertainties in Physical Measurements, University Science Books, New York.
28.
Behnken
, H.
, and Hauk
, V.
, 1986
, “Berechnung der ro¨ntgenographischen Elastizita¨tkonstanten (REK) des Vielkristalls aus Einkristalldaten fu¨r beliebige Kristalsymmetrie
,” Z. Metallkd.
, 77
, pp. 620
–626
.29.
Kuhlman, G. W., Rohde, K. A., and Chakrabarti, A. K., 1993, in Titanium ’92, Science and Technology, Proceedings of the 7th World Titanium Conference, F. H., Froes and I. L. Caplan, eds., San Diego, CA, pp. 1371–1378.
30.
Pang
, J. W. L.
, Holden
, T. M.
, and Mason
, T. E.
, 1999
, “Intergranular Stresses in 350WT Steel
,” J. Strain Anal.
, 33
, pp. 373
–383
.31.
Pintschovius, L., 1992, in Measurement of Residual and Applied Stress Using Neutron Diffraction, M. T. Hutchings and A. D. Krawitz, eds., Kluwer Academics, Dordrecht, pp. 115–130.
32.
Evenschor
, P. D.
, and Hauk
, V.
, 1972
, “Berechnung der ro¨ntgenographischen Elastizita¨tskonstanten aus den Einkristallkoeffizienten hexagonal kristallisierende Metalle
,” Z. Metallkd.
, 63
, pp. 798
798
.33.
Bruno
, G.
, and Dunn
, B. D.
, 1997
, “Precise Measurement of Ti6Al4V α-(011_1) Elastic Constants by Means of Neutron Diffraction
,” Meas. Sci. Technol.
, 8
, pp. 1244
–1249
.34.
Butler
, B. D.
, Murray
, B. C.
, Reichel
, D. G.
, and Krawitz
, A. D.
, 1989
, “Elastic Constants of Alloys Measured With Neutron Diffraction
,” Adv. X-Ray Anal.
, 32
, pp. 389
–394
.35.
Macherauch
, E.
, and Wohlfahrt
, H.
, 1977
, “Die Ursachen des Schweißeigenspannungszustandes
,” Materialpru¨fung
, 19
, pp. 272
–284
.36.
Nitschke-Pagel, T., and Wohlfahrt, H., 2000, “Residual Stress Relaxation in Welded High Strength Steels Under Different Loading Conditions,” Proceedings ICRS-6 Oxford, UK, pp. 1495–1502.
37.
Albertini
, G.
, Bruno
, G.
, Dunn
, B. D.
, Fiori
, F.
, Reimers
, W.
, and Wright
, J. S.
, 1997
, “Comparative Neutron and X-Ray Residual Stress Measurements in AA2219 Welded Plate
,” Mater. Sci. Eng.
, A224
, pp. 157
–165
.38.
Bruno
, G.
, 2002
, “Relaxation of Residual Stress in As-Welded and Aged AISI 347 Pipe by Means of Time-of-Flight Neutron Diffraction
,” Z. Metallkd.
, 93
, pp. 33
–41
.39.
Timoshenko, S., and Woinowsky-Kreiger, S., 1969, Theory of Plates and Shells, McGraw and Hill, New York.
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