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The paper deals with the dislocation dynamics of coherently propagating modes of plastic shear (Lüders band) in single crystals oriented for single slip in terms of a generalised Fisher-Kolmogorov equation. The roles of cross-slip and non-axial stresses as propagation mechanisms are investigated, and the problem of propagation velocity selection is addressed. The phenomenon of slip band clustering which was observed in sufficiently thick tensile specimens is traced back to a propagative instability owing to non-axial stresses.

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Authors: HÄHNER P, JRC Ispra (IT)
Bibliographic Reference: Article: Applied Physics A, Vol. 58 (1994) pp. 41-48
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