On the Role of Phenomenology and Dislocations in Modelling of Portevin - Le Chatelier Effect

Peter B. Béda

doi:10.4028/www.scientific.net/MSF.729.138

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HomeMaterials Science ForumMaterials Science Forum Vol. 729On the Role of Phenomenology and Dislocations in...

On the Role of Phenomenology and Dislocations in Modelling of Portevin - Le Chatelier Effect

Abstract:

A strange self-sustained oscillation in plastic uniaxial tension of various materials is called the Portevin Le Chatelier (PLC) effect. In modelling PLC dynamic strain aging is the common way of explanation. It is based mainly on dislocation dynamics. Experimental studies show the negative strain rate dependence (NRS) is always present at PLC. By using continuum mechanics and dynamical systems theory we find that NRS is the essential reason of it.

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Materials Science Forum (Volume 729)

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138-143

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.729.138

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Online since:

November 2012

Authors:

Peter B. Béda

Keywords:

Dynamic Shear Banding, Mathematical Modeling, Yerky Flow

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References

[1] A. Benallal, T. Borvik, A. Clausen, O. Hopperstad, Dynamic strain aging, negative strain-rate sensitivity and related instabilities, Technische Mechanik 23 (2003) 160-166.

Google Scholar

[2] Q. Zhang, Z. Jiang, H, Jiang, Z. Chen, X. Wu, On the propagation and pulsation of Portevin–Le Châtelier deformation bands: an experimental study with digital speckle pattern metrology. Int. J. Plasticity 21 (2005) 2150-2173.

DOI: 10.1016/j.ijplas.2005.03.017

Google Scholar

[3] S. Kok, M.S. Bharathi, A.J. Beaudoin, C. Fressengeas, G. Ananthakrishna, L.P. Kubin, M. Lebyodkin, Spatial coupling in jerky ﬂow using polycrystal plasticity, Acta Materialia 51 (2003) 3651-3662.

DOI: 10.1016/s1359-6454(03)00114-9

Google Scholar

[4] P.B. Béda, On modeling of Portevin - Le Chatelier effect, Materials Science Forum, 659 (2010) 367-371.

DOI: 10.4028/www.scientific.net/msf.659.367

Google Scholar

[5] T. Böhlke, G. Bondár, Y. Estrin, M.A. Lebyodkin, Geometrically non-linear modeling of the Portevin–Le Chatelier effect, Computational Materials Science, 44 (2009) 1076-1088.

DOI: 10.1016/j.commatsci.2008.07.036

Google Scholar

[6] R. Rosen, Anticipatory Systems, Pergamon Press, (1985).

Google Scholar

[7] A. Benallal, T. Berstad, T. Borvik, O.S. Hopperstad, Uniqueness, loss of ellipticity and localization for the time-discretized, rate-dependent boundary value problem with softening, Int. J. Numer. Meth. Engng. 84, (2010) 864-882.

DOI: 10.1002/nme.2931

Google Scholar