Abstract
The fracture toughness of Al-Zn-Mg-Cu-based 7XXX aluminum alloys decreases with an increase in the extent of recrystallization. In this contribution, the fracture path of plane-strain fracture-toughness specimens of 7050 alloy (a typical alloy of the 7XXX series) is quantitatively characterized as a function of degree of recrystallization, specimen orientation, and aging condition. The fracture path is quantitatively correlated to fracture toughness, and the bulk microstructural attributes estimated via stereological analysis. In the companion article, these quantitative data are used to develop and verify a multiple-fracture micromechanism-based model that relates the fracture toughness to a number of microstructural parameters of the partially recrystallized alloy plate.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J.T. Staley: ASTM Standard Technical Publication No. 605, ASTM, Philadelphia, PA, 1976, pp. 71–103.
T. Kawabata and O. Izumi: Acta Metall., 1977, vol. 25, pp. 505–12.
T. Ohira and T. Kishi: Mater. Sci. Eng., 1986, vol. 78, pp. 9–19.
I. Kirman: Metall. Trans., 1977, vol. 2, pp. 1761–70.
G.M. Ludtka and D.E. Laughlin: Metall. Trans. A, 1982, vol. 13A, pp. 411–25.
J.W. Yeh and Kuo-Shung Liu: Trans. Jpn. Inst. Met., 1986, vol. 27, pp. 504–11.
E. Hornbogen and E.A. Starke, Jr.: Acta Metall., 1993, vol. 41, pp. 1–16.
E. Hornbogen and M. Garf: Acta Metall., 1977, vol. 25, pp. 877–81.
H.J. Roven: Scripta Metall., 1992, vol. 26, pp. 1383–88.
T. Kawabata and O. Izumi: Acta Metall., 1976, vol. 24, pp. 817–25.
A.M. Gokhale and N.U. Deshpande: Metall. Mater. Trans. A, 1998, vol. 29A, pp. 1203–10.
J.T. Staley, H.Y. Hunsicker, and R.H. Brown: U.S. Patent No. 3,881,966, 1975.
K.S. Rangathan: Ph.D. Dissertation, Georgia Institute of Technology, Atlanta, GA, 1991.
J.C. Ehrstrom, R. Sahani, A. Reeves, and P. Sainfort: Proc. 4th Int. Conf. Aluminum Alloys, T.H. Sanders, Jr. and E.A. Starke, Jr., eds. Georgia Institute of Technology, Atlanta, GA, 1994, pp. 11–16.
M. Conserva and P. Fiorini: Metall. Trans., 1973, vol. 4, pp. 857–62.
J.T. Staley: Mater. Sci. Technol., 1987, vol. 3, pp. 923–34.
A.K. Vasudevan and R.D. Doherty: Acta Metall., 1987, vol. 35, pp. 1193–19.
E.A. Starke, Jr.: J. Met., 1970, pp. 54–63.
T.H. Sanders, Jr. and E.A. Starke, Jr.: Metall. Trans. A, 1976, vol. 7A, pp. 1407–18.
H. Cai, J.T. Evans, and D. Boomer: Mater. Sci. Eng., 1992, vol. 42, pp. 589–600.
J.T. Staley: Proc. 3rd Int. Conf. on Aluminum Alloys, L. Arlberg, O. Lohne, E. Nes, and N. Ryum, eds., 1992, pp. 107–43.
F.S. Lin and E.A. Starke, Jr.: Mater. Sci. Eng., 1979, vol. 39, pp. 27–41.
N.U. Deshpande: Ph.D. Thesis, Georgia Institute of Technology, Atlanta, GA, 1996.
E.E. Underwood: Quantitative Stereology, Addison-Wesley, Reading, MA, 1970.
A.J. Baddley, H.J.G. Gundersen, and L.M. Cruz Orive: J. Microsc., 1986, vol. 142, pp. 259–76.
A.M. Gokhale and W.J. Drury: Metall. Mater. Trans. A, 1994, vol. 25, pp. 919–28.
A.M. Gokhale and N.U. Deshpande: in Quantitative Microscopy and Image Analysis, D.D. Diaz, ed., ASM INTERNATIONAL, Materials Park, OH, 1994, pp. 73–82.
A.M. Gokhale, C.V. Iswaran, and R.T. DeHoff: Metall. Trans. A, 1979, vol. 10A, pp. 1239–45.
T.L. Andersen: Fundamentals and Applications of Fracture Mechanics, CRC Press, London, 1991.
M.A. Meyers and K.K. Chawla: Mechanical Metallurgy Principles and Applications, Prentice-Hall, Englewood Cliffs, NJ, 1984, pp. 163.
M. Ninomi and T. Kobayashi: Proc. MRS Int. Meeting on Advanced Materials, 1989, vol. 5, pp. 379–84.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Deshpande, N.U., Gokhale, A.M., Denzer, D.K. et al. Relationship between fracture toughness, fracture path, and microstructure of 7050 aluminum alloy: Part I. Quantitative characterization. Metall Mater Trans A 29, 1191–1201 (1998). https://doi.org/10.1007/s11661-998-0246-3
Received:
Issue Date:
DOI: https://doi.org/10.1007/s11661-998-0246-3