Nanoindentation-Induced Collective Dislocation Behavior and Nanoplasticity

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The present paper summarizes the crystallographic dependence of the displacement burst behavior observed in nanoindentation using two single crystalline aluminum (Al) materials and copper (Cu) with three kinds of surface indices, namely (001), (110) and (111). From the critical indent load at the first burst, the critical resolved shear stresses (CRSSs) of the collective dislocation nucleation were estimated in reference to molecular dynamics (MD) simulations. These are almost one-tenth of the shear modulus, which are close to the ideal values. We explain the nanoplastic mechanics by a comprehensive energy balance model to describe the linear relation between the indent load and the burst width of the first displacement burst and by the nucleation model consisting of three-dimensional discrete dislocations to evaluate the number of dislocations nucleating. The distance between the emitted dislocation loops of Al is found to be fairly large. Thus, Al is expected to exhibit a less tangled network of dislocations just below the indentation than Cu, which has a lower stacking fault energy.

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Periodical:

Key Engineering Materials (Volumes 340-341)

Edited by:

N. Ohno and T. Uehara

Pages:

39-48

Citation:

Y. Shibutani and T. Tsuru, "Nanoindentation-Induced Collective Dislocation Behavior and Nanoplasticity", Key Engineering Materials, Vols. 340-341, pp. 39-48, 2007

Online since:

June 2007

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$38.00

[1] S. Suresh, T. -G. Nieh and B.W. Choi: Scripta Materialia, Vol. 41 (1999), p.951.

[2] A. Gouldstone, H. -J. Koh, K. -Y. Zeng, A.E. Gannakopoulos and S. Suresh: Acta mater., Vol. 48 (2000), p.2277.

[3] M. Seo and M. Chiba: Electrochemica Acta, Vol. 47 (2001), p.319.

[4] Y. Shibutani and A. Koyama: J. Mater. Res., Vol. 19 (2004), p.183.

[5] I.N. Sneddon: Int. J. Eng. Sci., Vol. 3 (1965), p.47.

[6] T. A Michalske and J. E Houston: Acta mater., Vol. 46 (1998), p.391.

[7] K.J. Van Vliet, J. Li, T. Zhu, S. Yip and S. Suresh: Phys. Rev. B, Vol. 67 (2003), p.104105.

[8] S.V. Dmitriev, J. Li, N. Yoshikawa and Y. Shibutani: Phil. Mag., Vol. 85 (2005), p.2177.

[9] J. P Hirsh and J. Lothe: Theory of Dislocations (Krieger Publishing Company, 1982).

[10] M.F. Ashby and L. Johnson: Phil. Mag., Vol. 20 (1969), p.1009.

[11] Y. Shibutani and T. Tsuru: Trans. of JSME, Vol. 70 (2004), p.947 (in Japanese).

[12] T. Tsuru and Y. Shibutani: Modelling and Simul. in Mat. Sci. & Eng. modeling, Vol. 14 (2006), p. S55.

[13] D. Tabor: The Hardness of Metals (Oxford University Press, 1951).

[14] C.B. Carter and I.L. F Ray: Philos. Mag., Vol. 35 (1977), p.189.

[15] L.E. Murr: Interfacial Phenomena in Metals and Alloys (Addison-Wesley, 1975).

[16] Y. Shibutani, A. Koyama and T. Tsuru, in: IUTAM Symposium on Multiscale Modeling and Characterization of elastic-Inelastic Behavior of Engineering Materials, edited by S. Ahzi, et al., p.125, Kluwer Academic Publishers (2004).

DOI: https://doi.org/10.1007/978-94-017-0483-0_16

[17] M.C. Fivel, C.F. Robertson, G.R. Canova and L. Boulanger: Acta mater., Vol. 46 (1998), p.6183.

[18] J.D. Kiely, R.Q. Hwang and J.E. Hamilton: Phys. Rev. Lett., Vol. 81 (1998), p.4422.

[19] K.L. Johnson: Contact Mechanics (Cambridge University Press, 1985).

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