The Role of Cross-Slip of Screw Dislocations in Fatigue Behavior of Copper Single Crystals

AT Winter; NY Jin

doi:10.1520/STP23207S

SYMPOSIA PAPER Published: 01 January 1988

STP23207S

The Role of Cross-Slip of Screw Dislocations in Fatigue Behavior of Copper Single Crystals

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Differently oriented copper single crystals were fatigued, where the Schmid factor for primary screw dislocations moving on the cross-slip plane differed markedly while that for primary slip remained more or less constant. The experimental results show that the cyclic hardening rate depends on crystal orientation. The saturation properties, the saturation stress, and the plastic strain in the persistent slipbands, are orientation independent. It seems likely that cross-slip is important only in the early stage of cyclic deformation, but not in the saturation.

Author Information

Jin, NY

Cavendish Laboratory, Cambridge, England Shanghai Jiao Tong University, Shanghai, China

Winter, AT

Cavendish Laboratory, Cambridge, England

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Details

Developed by Committee: E08

Pages: 17–25

DOI: 10.1520/STP23207S

ISBN-EB: 978-0-8031-5034-8

ISBN-13: 978-0-8031-0925-4

The Role of Cross-Slip of Screw Dislocations in Fatigue Behavior of Copper Single Crystals

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