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The geometry of the plastic deformation of polycrystalline aggregates

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Summary

A full geometric analysis of the tensile deformation of cube-texture copper has been carried out by which it has been possible to predict the limit of uniform elongation and associated lattice rotation as well as to account for the plastic anisotropy of cube-texture material. The yield criterion of the oriented material over the whole plastic range is shown to be one of limiting shear energy on particular crystallographic shear systems and this enables the tensile stress-strain relation of the random polycrystalline aggregate to be derived.

Zusammenfassung

Eine vollständige geometrische Analyse der Streckverformung von Kupfer mit Texturen der Kristallite in Würfellage wurde durchgeführt, wodurch es möglich war, die Grenze gleichförmiger Verlängerung und der damit verbundenen Gitterrotation vorauszusagen und auch die plastische Anisotropie dieses Materials zu berechnen. Das Fließgrenzenkriterium (die kritische Fließgrenze) für orientiertes Material über den ganzen Plastizitätsbereich erweist sich als eine der begrenzenden Scherenergien an bestimmten kristallographischen Schersystemen, und so wird es möglich, die Zugspannungs-Dehnungsbeziehung für statistisch polykristallines Material abzuleiten.

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Richards, T.L. The geometry of the plastic deformation of polycrystalline aggregates. Rheol Acta 2, 1–9 (1962). https://doi.org/10.1007/BF01972547

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  • DOI: https://doi.org/10.1007/BF01972547

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