Accession Number:

AD0453317

Title:

WORK HARDENING OF COPPER CRYSTALS BY CYCLIC STRAINING,

Descriptive Note:

Corporate Author:

ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)

Personal Author(s):

Report Date:

1964-08-01

Pagination or Media Count:

1.0

Abstract:

Copper single crystals were strained cyclically between constant plastic strain limits. The mechanical hysteresis loops were plotted. The loop shape became constant after a few cycles while the peak stress increased for a few hundred cycles. The effect of sudden changes in temperature or in strain rate on the flow stress was observed and comparison tests were made on similar crystals strained unidirectionally. It is concluded that the frequency factor of the thermally activated process controlling the strain rate is higher in the cyclically hardened crystals. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE