WORK HARDENING OF COPPER CRYSTALS BY CYCLIC STRAINING,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1964
- Accession Number
- AD0453317
Entities
People
- J. Hutchings
- N. J. Wadsworth
Organizations
- Royal Aircraft Establishment