Ultimate Strengthening, Theoretical and Limit Tool Hardness

Abstract:

The influence of passing from a microcrystalline to a nanocrystalline structure on the mechanical properties of chromium deposited by magnetron sputtering is studied. The possibility of additional strengthening nanomaterials due to enrichment of grain boundaries by “useful” additives elements is established. A wide spectrum of materials in different structural states was investigated by the method of micromechanical tests. The notions of the “theoretical” hardness (largest hardness for the material) and “limit tool” hardness, connected with tool limitations in indentation, are introduced.

• Periodical: Key Engineering Materials (Volume 409)
• Pages: 128-136
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.409.128
• Online since: March 2009
• Authors: Sergiy A. Firstov, Tamara G. Rogul, Victor F. Gorban, Engel P. Pechkovsky
• Keywords: Hardness, Micromechanical Test, Nanocrystalline Structure, Strengthening

References

[1] V.G. Gryaznov and L.I. Trusov: Progr. Mater. Sci. Vol. 37 No. 4 (1993), p.289.

[2] G.E. Fougere, J.R. Weertman and R.W. Siegel: Scripta Met. Vol. 6 (1992), p.1879.

[3] N.G. Nieh and J. Wadsworth: Scripta Met. Mater. Vol. 25 (1991), p.955.

[4] C.W. Su, B.W. Chua, L. Lu and M.O. Lai: Mater. Sci. Eng. A. Vol. 402 (2005), p.163.

[5] K. Kumar et al.: Acta Mater. Vol. 51 (2003).

[6] T. Christman: Scripta Met. Mater. Vol. 28 (1993), p.1495.

[7] S.A. Firstov, T.G. Rogul et al., in: NATO ARW -Materials with high strength‖, Kiev, 2003, Kluver Publisher (2004), p.341.

[8] S.A. Firstov, T.G. Rogul et al.: Problems of Materials Science (Voprosi materialovedenia), (2003), 1(33), p.201.

[9] A.W. Thompson: Metal . Trans. Vol. 8A, 6 (1977), p.833.

[10] S.A. Firstov, N.V. Grajvoronsky and G.F. Sarzhan: Met. Phys. Adv. Tech. Vol. 17 (1998), p.105.

[11] S. Veprek, S. Reiprich and L. Shizhi: Appl. Phys. Lett. Vol. 66 (20) (1995), p.2640.

[12] S. Veprek and S. Reiprich: Thin Solid Films Vol. 268 (1995), p.64.

[13] L.J. Gibson and M.F. Ashby: Cellular solids: Structure & properties, Oxford: Pergamon Press, ISBN: 0-08-036607-4, (1988).

DOI: 10.1002/adv.1989.060090207

[14] R.Z. Valiev and I.V. Alexandrov: Nanostructured Materials produced by Severe Plastic Deformation (in Russian), Moskow, Logos, RF, 272, (2000).

[15] Y-T Cheng and Ch-M Cheng: Appl. Phys. Lett. Vol. 73, No. 5 (1998), p.614.

[16] W.C. Oliver and G.M. Pharr: J. Mater. Res. Vol. 7, No. 6 (1992), p.1564.

[17] S.A. Firstov and T.G. Rogul (in Russian), Reports of the National Academy of Sciences of Ukraine (Dopovidi NANU), № 4, (2007), p.110.

[18] J. Hirth and I. Lothe: Theory of Dislocations, McGraw-Hill, (1968).

[19] A. Kelly: Strong solids, Clarendon Press. Oxford, 261, (1973).

[20] D. Tabor: Phil. Mag.A., Vol. 74, No. 5 (1996), p.1207.

[21] K. Johnson: Contact mechanics, Cambridge University Press, 510, (1987).

[22] W.C. Oliver and G.M. Pharr: J. Mater. Res. Vol. 19, No. 1 (2004), p.3.

[23] S.A. Firstov, V.F. Gorban et al. (in Russian), Reports of the National Academy of Sciences of Ukraine (Dopovidi NANU), 12 (2007), p.100.