Metallurgical and Materials Transactions A

, Volume 36, Issue 7, pp 1689–1696 | Cite as

Enhanced deformation mechanisms by anisotropic plasticity in polycrystalline Mg alloys at room temperature

  • J. Koike


This article presents room-temperature deformation mechanisms in polycrystalline Mg alloys. Dislocation slip of basal 〈a〉 and prismatic 〈a〉 types are shown to occur nearly at the same ease when the basal planes are tilted in such a way that the Schmid-factor ratio (equivalent to the critically resolved shear stress (CRSS) ratio) of prismatic 〈a〉 to basal 〈a〉 slip is larger than a value ranging from 1.5 to 2.0, depending on the initial texture distribution and grain size. Grain-boundary sliding (GBS) also occurs at room temperature up to 8 pct of total strain, enhanced by plastic anisotropy as well as by the increasing number of grain-boundary dislocations. Twinning plays an important role in both flow and fracture behaviors. Twins are induced mostly by stress concentrations caused by the anisotropic nature of dislocation slip. Twins can be classified into two types based on their shape: a wide lenticular type and a narrow banded type. The wide twins are \(\{ 10\bar 12\} \) twins appearing in the early stage of deformation and accompany little change of surface height. The narrow twins are \(\{ 10\bar 11\} \) or \(\{ 30\bar 32\} \) appearing in the late stage of deformation and accompany a substantial change in surface height. The formation of the narrow twins seems to give rise to highly localized shear deformation within the twin, leading to strain incompatibility and to final failure.


Material Transaction Compatibility Effect Critical Resolve Shear Stress Basal Slip Dislocation Slip 
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.
    F.E. Hauser, P.R. Landon, and J.E. Dorn: Trans. ASM, 1958, vol. 50, p. 856.Google Scholar
  2. 2.
    H. Yoshinaga and R. Horiuchi: Trans. JIM, 1963, vol. 4, p. 134.Google Scholar
  3. 3.
    W.F. Sheerly and R.R. Nash: Trans. TMS-AIME, 1960, vol. 218, p. 416.Google Scholar
  4. 4.
    T. Obara, H. Yoshinaga, and S. Morozumi: Acta Metall., 1973, vol. 21, p. 845.CrossRefGoogle Scholar
  5. 5.
    H. Yoshinaga and R. Horiuchi: Trans. JIM, 1963, vol. 5, p. 14.Google Scholar
  6. 6.
    J.F. Stohr and J.P. Poirier: Phil. Mag., 1972, vol. 25, p. 1313.Google Scholar
  7. 7.
    ASM Specialty Handbook, Magnesium and Magnesium Alloys, M.M. Avedesian and H. Baker, eds., ASM INTERNATIONAL, Materials Park, OH, 1999, p. 17.Google Scholar
  8. 8.
    T. Mukai, M. Yamanoi, H. Watanabe, and K. Higashi: Scripta Mater., 2001, vol. 45, p. 89.CrossRefGoogle Scholar
  9. 9.
    T. Mukai: National Institute for Materials Science, Tsukuba, Japan, private communication, 2003.Google Scholar
  10. 10.
    S.L. Couling and C.S. Roberts: Acta Cryst., 1956, vol. 9, p. 972.CrossRefGoogle Scholar
  11. 11.
    R.E. Reed-Hill and W.D. Robertson: Acta Metall., 1957, vol. 5, p. 728.CrossRefGoogle Scholar
  12. 12.
    H. Yoshinaga and R. Horiuchi: Trans. JIM, 1963, vol. 4, p. 1.Google Scholar
  13. 13.
    B.C. Wonsiewicz and W.A. Backofen: Trans. TMS-AIME, 1967, vol. 239, p. 1422.Google Scholar
  14. 14.
    M.A. Meyers, O. Vöringer, and V.A. Lubarda: Acta Mater., 2001, vol. 49, p. 4025.CrossRefGoogle Scholar
  15. 15.
    T. Takasugi, O. Izumi, and N. Fat-Halla: J. Mater. Sci., 1978, vol. 13, p. 2013.CrossRefGoogle Scholar
  16. 16.
    S. Miura, K. Hamashima, and K.T. Aust: Acta Metall., 1980, vol. 28, p. 1591.CrossRefGoogle Scholar
  17. 17.
    C. Rey and A. Zaoui: Acta Metall., 1982, vol. 30, p. 523.CrossRefGoogle Scholar
  18. 18.
    P. Sittner and V. Paidar: Acta Metall., 1989, vol. 37, p. 1717.CrossRefGoogle Scholar
  19. 19.
    K. Maruyama, M. Akabori, and S. Karashima: Trans. JIM, 1981, vol. 22, p. 723.Google Scholar
  20. 20.
    V. Jayaram: Acta Metall., 1987, vol. 35, p. 1307.CrossRefGoogle Scholar
  21. 21.
    C.K. Chyung and C.T. Wei: Phil. Mag., 1967, vol. 15, p. 161.Google Scholar
  22. 22.
    T. Kobayashi, J. Koike, Y. Yoshida, S. Kamado, M. Suzuki, K. Maruyama, and Y. Kojima: J. Jpn. Inst. Met., 2003, vol. 67, p. 149.Google Scholar
  23. 23.
    J. Koike, T. Kobayashi, T. Mukai, H. Watanabe, M. Suzuki, K. Maruyama, and K. Higashi: Acta Mater., 2003, vol. 51, p. 2055.CrossRefGoogle Scholar
  24. 24.
    R. Ohyama, J. Koike, M. Suzuki, and K. Maruyama: J. Jpn. Inst. Met., 2003, vol. 68, p. 27.CrossRefGoogle Scholar
  25. 25.
    J. Koike and R. Ohyama: Acta Mater., 2005, vol. 53, p. 1963.Google Scholar
  26. 26.
    S.R. Agnew and O. Duygulu: Mater. Sci. Forum, 2003, vols. 419–422, p. 177.Google Scholar
  27. 27.
    R.A. Lebensohn and C.N. Tomé: Acta Metall., 1993, vol. 41, p. 2611.CrossRefGoogle Scholar
  28. 28.
    S.R. Agnew, C.N. Tomé, D.W. Brown, T.M. Holden, and S.C. Vogel: Scripta Mater., 2003, vol. 48, p. 1003.CrossRefGoogle Scholar
  29. 29.
    P.A. Turner and C.N. Tomé: Acta Mater., 1994, vol. 42, p. 4113.Google Scholar
  30. 30.
    A. Styczyncki, Ch. Hartig, J. Bohlen, and D. Letzig: Scripta Mater., 2004, vol. 50, p. 943.CrossRefGoogle Scholar
  31. 31.
    G.I. Taylor: J. Inst. Met., 1938, vol. 62, p. 307.Google Scholar
  32. 32.
    S.R. Agnew, M.H. Yoo, and C.N. Tomé: Acta Mater., 2001, vol. 49, p. 4277.CrossRefGoogle Scholar
  33. 33.
    P. Anderson, C.H. Cáceres, and J. Koike: Mater. Sci. Forum, 2003, vols. 419–422, p. 123.CrossRefGoogle Scholar
  34. 34.
    M.R. Barnett, Z. Keshavarz, AG, Beer, and D. Atwell: Acta Mater., 2004, vol. 52, p. 5093.CrossRefGoogle Scholar
  35. 35.
    M.A. Meyers and E. Ashworth: Phil. Mag. A, 1982, vol. 46, p. 737.Google Scholar
  36. 36.
    H.H. Fu, D.J. Benson, and M.A. Meyers: Acta Mater., 2001, vol. 49, p. 2567.CrossRefGoogle Scholar
  37. 37.
    C.H. Cáceres, T. Sumitomo, and M. Veidt: Acta Mater., 2003, vol. 51, p. 6211.CrossRefGoogle Scholar
  38. 38.
    F.E. Hauser, C.D. Starr, L. Tietz, and J.E. Dorn: Trans. ASM, 1955, vol. 47, p. 102.Google Scholar
  39. 39.
    F.E. Hauser, P.R. Landon, and J.E. Dorn: Trans. ASM, 1956, vol. 48, p. 986.Google Scholar
  40. 40.
    R.C. Gifkins and T.G. Langdon: J. Inst. Met., 1964–1965, vol. 93, p. 347.Google Scholar
  41. 41.
    S. Hwang, C. Nishimura, and P.G. McCormick: Scripta Mater., 2001, vol. 44, p. 1507.CrossRefGoogle Scholar
  42. 42.
    J. Koike, R. Ohyama, T. Kobayashi, M. Suzuki, and K. Maruyama: Mater. Trans., 2003, vol. 44, p. 445.CrossRefGoogle Scholar
  43. 43.
    J.A. Chapman and D.V. Wilson: J. Inst. Met., 1962–63, vol. 91, p. 39.Google Scholar
  44. 44.
    P. Mussot, C. Rey, and A. Zaoui: Res. Mechanica, 1985, vol. 14, p. 69.Google Scholar
  45. 45.
    T. Watanabe, M. Yamada, S. Shima, and S. Karashima: Phil. Mag. A, 1979, vol. 40, p. 667.Google Scholar
  46. 46.
    R.Z. Valiev and O.A. Kaibyshev: Acta Mmetall., 1983, vol. 31, p. 2121.CrossRefGoogle Scholar
  47. 47.
    T. Takahashi and R. Horiuchi: J. Jpn. Inst. Met., 1984, vol. 48, p. 461.Google Scholar
  48. 48.
    S. Ando, T. Gotoh, and T. Tonda: Metall. Mater. Trans. A, 2002, vol. 33A, p. 823.Google Scholar
  49. 49.
    S. Ando and T. Tonda: Mater. Trans. JIM, 2000, vol. 41, p. 1188.Google Scholar
  50. 50.
    S.R. Agnew, J.A. Horton, and M.H. Yoo: Metall. Mater. Trans. A, 2002, vol. 33A, p. 851.Google Scholar
  51. 51.
    P. Klimanek and A. Pötzsch: Mater. Sci. Eng. A, 2002,vol. A324, p. 145.Google Scholar
  52. 52.
    M.H. Yoo: Metall. Trans. A, 1981, vol. 12A, p. 409.Google Scholar
  53. 53.
    P.G. Partridge: Metall. Rev., 1967, p. 169.Google Scholar
  54. 54.
    J. Koike, Y. Yoshida, T. Kobayashi, and S. Kamado: unpublished research, 2004.Google Scholar
  55. 55.
    H. Asada and H. Yashinaga: J. Jpn. Inst. Met., 1958, vol. 23, p. 67.Google Scholar
  56. 56.
    M.R. Barnett, M.D. Nave, and C.J. Bettles: Mater. Sci. Eng. A, 2004, vol. A386, p. 205.Google Scholar
  57. 57.
    M.D. Nave and M.R. Barnett: Scripta Mater., 2004, vol. 51, p. 881.CrossRefGoogle Scholar
  58. 58.
    P. Yang, Y. Yu, L. Chen, and W. Mao: Scripta Mater., 2004, vol. 50, p. 1163.CrossRefGoogle Scholar
  59. 59.
    R.E. Reed-Hill and W.D. Robertson: Acta Metall., 1957, vol. 5, p. 717.CrossRefGoogle Scholar
  60. 60.
    S. Miura: Hokkaido University, Hokkaido, Japan, unpublished research, 2004.Google Scholar
  61. 61.
    R.E. Reed-Hill: Trans. AIME, 1960, vol. 218, p. 554.Google Scholar
  62. 62.
    H. Yoshinaga, T. Obara, and S. Morozumi: Mater. Sci. Eng., 1973, vol. 12, p. 255.CrossRefGoogle Scholar
  63. 63.
    E. Roberts and P.G. Partridge: Acta Metall., 1966, vol. 14, p. 513.CrossRefGoogle Scholar

Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2005

Authors and Affiliations

  • J. Koike
    • 1
  1. 1.the Department of Materials ScienceTohoku UniversitySendaiJapan

Personalised recommendations