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Journal Article

The Fold-Sector Dependence of Plastic Deformation Modes in Polyethylene Single Crystals

P. Allan and M. Bevis
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences
Vol. 341, No. 1624 (Oct. 29, 1974), pp. 75-90
Published by: Royal Society
Stable URL: https://www.jstor.org/stable/78669
Page Count: 21
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The Fold-Sector Dependence of Plastic Deformation Modes in Polyethylene Single Crystals
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Abstract

It is generally recognized that there are significant differences in the geometry of folded chain molecules from sector to sector in diamond shaped polyethylene single crystals. Single crystals of this type were deformed on a Mylar substrate in order to determine the effect of changes in fold geometry on the operative deformation processes. A marked dependence of the operation of stress induced slip, twinning and martensitic transformation with fold geometry was observed. The differences in the deformation behaviour of adjacent fold sectors could be explained simply in terms of the orientation of the molecular folds with respect to the tensile axis.

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