Environmentally assisted cracking behavior of peak-aged 7010 aluminum alloy containing scandium
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thors are grateful to Messrs. Y. Saita and R. Fujii for their experimental assistance. We acknowledge Drs. J. Yu and Y. Arai for their interest in the present work and their assistance in sample preparation. REFERENCES 1. J.L. Walker: in The Physical Chemistry of Process Metallurgy, G.R. St. Pierre, ed., (AIME), Interscience, New York, NY, 1961, pp. 845-53. 2. J.D. Hunt and K.A. Jackson: J. Appl. Phys., 1966, vol. 37, pp. 254-57. 3. K. A. Jackson, J.D. Hunt, D.R. Uhlmann, and T.P. Seward: Trans. TMS-AIME., 1966, vol. 236, pp. 149-58. 4. J.Z. Xiao, K.K. Leung, and H.W. Kui: Appl. Phys. Lett., 1995, vol. 67, pp. 3111-13. 5. A. M. Mullis and R.F. Cochrane: J. Appl. Phys., 1997, vol. 82, pp. 3783-90. 6. A.M. Mullis and R.F. Cochrane: J. Appl. Phys., 1998, vol. 84, pp. 4905-10. 7. A.M. Mullis and R.F. Cochrane: Acta Mater., 2001, vol. 49, pp. 2205-14. 8. K. Dragnevski, R.F. Cochrane, and A.M. Mullis: Phys. Rev. Lett., 2002, vol. 89, pp. 215502-1-215502-4. 9. For a review, see D.M. Herlach, K. Eckler, A. Karma, and M. Schwarz: Mater. Sci. Eng. A, 2001, vols. 304–306, pp. 20-25. 10. A. Karma: Int. J. Non-Equil. Process, 1998, vol. 11, pp. 201-33. 11. K. Eckler, A.F. Norman, F. Gärtner, A.L. Greer, and D.M. Herlach: J. Cryst. Growth, 1997, vol. 173, pp. 528-40. 12. G. Wilde, G.P. Görler, and R. Willnecker: Appl. Phys. Lett., 1996, vol. 69, pp. 2995-97. METALLURGICAL AND MATERIALS TRANSACTIONS A
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Environmentally Assisted Cracking Behavior of Peak-Aged 7010 Aluminum Alloy Containing Scandium M. BOBBY KANNAN, V.S. RAJA, A.K. MUKHOPADHYAY, and P. SCHMUKI The 7010 Al alloy with and without addition of 0.25 wt pct Sc in peak-aged condition was examined for its environmentally assisted cracking (EAC) behavior. Slow strain rate testing (SSRT) per ASTM standard G129-00 was employed to investigate EAC. The base 7010 Al alloy showed 10 pct elongation, 9.9 pct reduction in area, and 561 MPa ultimate tensile strength (UTS), when tested in air. The ductility of the base alloy dropped to 3 and 3.3 pct in terms of elongation and reduction in area, respectively, when tested in 3.5 pct NaCl solution, showing its high susceptibility to EAC. On the other hand, the
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