The dependence on temperature and strain rate of the flow stress of cyclically hardened copper single crystals
- 1 August 1964
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 10 (104) , 195-217
- https://doi.org/10.1080/14786436408225658
Abstract
Copper single crystals were strained cyclically with a plastic tensile strain amplitude of 0.5%. The variation of flow stress with strain rate and temperature was measured. Comparison measurements were made on specimens strained unidirectionally in the same apparatus. The variation of flow stress with temperature was considerably larger for the cyclically strained specimens than for the unidirectionally strained ones. The variation with strain rate was slightly larger. It is concluded that the frequency factor of the thermally activated rate-controlling process is considerably higher in the cyclically strained specimens. Considerable long-range internal stresses were present. They appeared to be a larger fraction of the applied stress in the unidirectional tests.Keywords
This publication has 11 references indexed in Scilit:
- Work hardening of copper crystals under cyclic strainingActa Metallurgica, 1963
- Dynamic recovery from strain-hardening in polycrystalline copper and aluminiumPhilosophical Magazine, 1962
- The strain-rate dependence of the flow stress of copper single crystalsPhilosophical Magazine, 1962
- Extended jogs in dislocations in face-centred cubic metalsPhilosophical Magazine, 1962
- Thermally activated glide in face-centred cubic metals and its application to the theory of strain hardeningPhilosophical Magazine, 1959
- The lattice energies of some oxides and the affinity of oxygen for two electronsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1957
- Work-hardening and work-softening of face-centred cubic metal crystalsPhilosophical Magazine, 1957
- Effects of temperature on the plastic properties of aluminium crystalsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1955
- Temperature Variation of the Elastic Constants of Cubic Elements. I. CopperPhysical Review B, 1955
- Transient Creep in Pure MetalsProceedings of the Physical Society. Section B, 1953