Metallurgical Transactions

, Volume 2, Issue 6, pp 1579–1586 | Cite as

Yield of polygonized aluminum single crystals

  • J. S. H. Lake
  • G. B. Craig
Mechanical Behavior


Large single crystal segments of aluminum were produced by strain anneal, deformed in tension, and sectioned to produce tensile specimens with axes parallel to the original tensile axis and with other orientations. The specimens were annealed to produce a polygonized substructure. Their critical shear stress in tension was determined. The critical shear stress was shown to be the sum of a substructure independent stress and a stress proportional to the square root of the average primary subboundary misorientation over the average primary subboundary spacing. Comparison of the critical shear stress of specimens cut from the same parent crystal with varying tensile axes demonstrated that the significant subboundary spacing is that between primary subboundaries along the active slip plane of the specimen. The tests also showed that average subboundary misorientation is significant because it represents the average spacing of dislocations in the subboundaries. The results, interpreted in terms of current substructure strengthening theories, indicate that slip is propagated across primary subboundaries by the activation of dislocation sources in the subboundaries.


Slip System Tensile Axis Critical Shear Stress Boundary Spacing Strain Anneal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    C. J. Ball:Phil. Mag., 1957, vol. 2, pp. 1011–17.CrossRefGoogle Scholar
  2. 2.
    J. T. McGrath and G. B. Craig:Trans. TMS-AIME, 1959, vol. 215, pp. 1022–25.Google Scholar
  3. 3.
    D. Ye. Ovsienko and Ye I. Sosnina:Phys. Metals Metallog., 1962, vol. 14, pp. 252–57.Google Scholar
  4. 4.
    F. Hultgren:Trans. TMS-AIME, 1964, vol. 230, pp. 898–903.Google Scholar
  5. 5.
    G. L. Montgomery: Ph.D. Thesis, University of Toronto, 1964.Google Scholar
  6. 6.
    J. S. H. Lake and G. B. Craig:Trans. ASM, 1968, vol. 61, pp. 829–33.Google Scholar
  7. 7.
    J. Herenguel and R. Second:Mem. Sci. Rev. Met. 1968, vol. 48, pp. 262–66.Google Scholar
  8. 8.
    J. S. H. Lake, G. L. Montgomery, and G. B. Craig:Can. Met. Quart., 1970, vol. 9, pp. 403–07.Google Scholar
  9. 9.
    J. Rezek and G. B. Craig:Trans. TMS-AIME, 1961, vol. 221, pp. 715–20.Google Scholar
  10. 10.
    U. F. Kocks and T. J. Brown:Acta Met., 1966, vol. 14, pp. 87–98.CrossRefGoogle Scholar
  11. 11.
    F. C. Frank:Defects in Crystailine Solids, pp. 150–51, Carnegie Institute of Technology, Pittsburgh, 1950.Google Scholar
  12. 12.
    E. O. Hall:Proc. Phys. Soc., London, 1951, vol. 64B, pp. 747–53.Google Scholar
  13. 13.
    J. C. M. Li:Trans. TMS-AIME, 1963, vol. 227, pp. 239–47.Google Scholar
  14. 14.
    J. P. Hirth and J. Lothe:Theory of Dislocations, pp. 694–718, McGraw Hill, New York, 1968.Google Scholar
  15. 15.
    J. C. M. Li:Electron Microscopy and Strength of Crystals, pp. 713–79, Interscience, New York, 1963.Google Scholar
  16. 16.
    J. S. H. Lake and G. B. Craig: Faculty of Applied Science and Engineering, University of Toronto, Toronto, Canada, unpublished research.Google Scholar
  17. 17.
    A. H. Cottrell:Trans. TMS-AIME, 1958, vol. 212, pp. 192–203.Google Scholar
  18. 18.
    J. S. H. Lake: Ph.D. Thesis, University of Toronto, 1969.Google Scholar

Copyright information

© Springer-Verlag 1971

Authors and Affiliations

  • J. S. H. Lake
    • 1
  • G. B. Craig
    • 2
  1. 1.Central Research LaboratoryJohn Lysaght (Australia) Ltd.NewcastleAustralia
  2. 2.Faculty of Applied Science and EngineeringUniversity of TorontoTorontoCanada

Personalised recommendations