Characterization of the Mechanical Properties of Surface Nanocrystallized Materials

  • Joshua D Gale
  • Jeremy Marshall
  • Ajit Achuthan
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)


Recrystallization of the grain structure of metals into nano-sized grains by using mechanical means, has received wide attention in the last two decades. It is well known that materials with a fine-grain crystal structure have favorable properties compared to the same materials with course-grained crystal structure. Surface Mechanical Attrition Treatment (SMAT), a technique developed in the early part of this decade, has been successfully used to recrystallize the surface grains of metals into nanocrystals of the order of 10 to 100 nanometers from their original grain sizes on the order of 10 to 30 microns. Resulting enhancement in surface properties has quite interesting applications, varying from materials with improved fatigue resistance to medical devices. In this study, our focus is on experimental characterization of the enhancement in mechanical properties of surface nanocrystallized metals. Copper, Aluminum and Titanium samples are subjected to SMAT under different conditions followed by appropriate heat treatment. Microindentation and nanoindentation techniques are conducted to characterize various mechanical properties. Microindentation test shows significant improvement in surface hardness due to SMAT process on these samples. Our initial results from nanoindentation also show significant enhancement in materials surface properties. However, several other interesting characteristics obtained in the nanoindentation tests require further studies for verification.


Severe Plastic Deformation Atomic Layer Deposition High Pressure Torsion Nanoindentation Test Surface Mechanical Attrition Treatment 
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  1. 1.
    Aifantis, K. E., and Konstantinidis, A. A., 2009, "Hall–Petch Revisited at the Nanoscale," Materials Science and Engineering: B, 163(3) pp. 139–144.CrossRefGoogle Scholar
  2. 2.
    Bao, Q., Chen, C., Wang, D., 2005, "Pulsed Laser Deposition and its Current Research Status in Preparing Hydroxyapatite Thin Films," Applied Surface Science, 252(5) pp. 1538–1544.CrossRefGoogle Scholar
  3. 3.
    Erb, U., Aust, K.T., and Palumbo, G., 2007, "Nanostructured Materials (Second Edition),"William Andrew Publishing, Norwich, NY, pp. 235–292.Google Scholar
  4. 4.
    Fecht, H.J., and Ivanisenko, Y., 2007, "Nanostructured Materials (Second Edition),"William Andrew Publishing, Norwich, NY, pp. 119–172.Google Scholar
  5. 5.
    Iwahashi, Y., Horita, Z., Nemoto, M., 1998, "The Process of Grain Refinement in Equal-Channel Angular Pressing," Acta Materialia, 46(9) pp. 3317–3331.CrossRefGoogle Scholar
  6. 6.
    Klepper, K. B., Nilsen, O., and Fjellvåg, H., 2007, "Growth of Thin Films of Co3O4 by Atomic Layer Deposition," Thin Solid Films, 515(20–21) pp. 7772–7781.CrossRefGoogle Scholar
  7. 7.
    Lu, J., and Lu, K., 2003, "Comprehensive Structural Integrity,"Pergamon, Oxford, pp. 495–528.Google Scholar
  8. 8.
    Lu, K., and Lu, J., 2004, "Nanostructured Surface Layer on Metallic Materials Induced by Surface Mechanical Attrition Treatment," Materials Science and Engineering A, 375-377pp. 38–45.CrossRefGoogle Scholar
  9. 9.
    Mao, X. Y., Li, D. Y., Fang, F., 2010, "A Simple Technique of Nanocrystallizing Metallic Surfaces for Enhanced Resistances to Mechanical and Electrochemical Attacks," Materials Science and Engineering: A, 527(12) pp. 2875–2880.CrossRefGoogle Scholar
  10. 10.
    Mao, X. Y., Li, D. Y., Fang, F., 2010, "Can Severe Plastic Deformation Alone Generate a Nanocrystalline Structure?" Philosophical Magazine Letters, 90(5) pp. 349.Google Scholar
  11. 11.
    Ren, J., Shan, A., Zhang, J., 2006, "Surface Nanocrystallization of Ni3Al by Surface Mechanical Attrition Treatment," Materials Letters, 60(17–18) pp. 2076–2079.CrossRefGoogle Scholar
  12. 12.
    Révész, Á., and Takacs, L., 2009, "Coating a Cu Plate with a Zr–Ti Powder Mixture using Surface Mechanical Attrition Treatment," Surface and Coatings Technology, 203(20–21) pp. 3026–3031.CrossRefGoogle Scholar
  13. 13.
    Sanders, P. G., Eastman, J. A., and Weertman, J. R., 1997, "Elastic and Tensile Behavior of Nanocrystalline Copper and Palladium," Acta Materialia, 45(10) pp. 4019–4025.CrossRefGoogle Scholar
  14. 14.
    Vorhauer, A., and Pippan, R., 2004, "On the Homogeneity of Deformation by High Pressure Torsion," Scripta Materialia, 51(9) pp. 921–925.CrossRefGoogle Scholar
  15. 15.
    Wang, K., Tao, N. R., Liu, G., 2006, "Plastic Strain-Induced Grain Refinement at the Nanometer Scale in Copper," Acta Materialia, 54(19) pp. 5281–5291.CrossRefGoogle Scholar

Copyright information

© Springer Science+Businees Media, LLC 2011

Authors and Affiliations

  • Joshua D Gale
    • 1
  • Jeremy Marshall
    • 1
  • Ajit Achuthan
    • 1
  1. 1.Department of Mechanical & Aeronautical EngineeringClarkson UniversityPotsdamUSA

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