Effect of grain size and ramp loading on the low amplitude cyclic stress-strain curve of polycrystalline copper
โ Scribed by L. Llanes; C. Laird
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 335 KB
- Volume
- 128
- Category
- Article
- ISSN
- 0921-5093
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โฆ Synopsis
Recent results reported by Lukfg and coworkers raise questions about the differences in the cyclic stress-strain curves (CSSCs) of polycrystalline copper reported by many workers. In order to differentiate the effects on the CSSC of grain size and the ramp-loading mode of initiating a test in cyclic deformation, these two factors have been studied. The greatest effects are found to be associated with the grain size and this result is used to explain differences in the results reported by Luk6~ and coworkers.
๐ SIMILAR VOLUMES
The length of the start-up loading sequence in stresscontrolled high-cycle fatigue tests was found to considerably affect the cyclic hardening curves, the corresponding saturated dislocation structures and the fatigue lives of polycrystalline copper specimens. These findings seem of particular impor