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Effect of texture and ramp loading on the cyclic response and dislocation substructure of copper polycrystals

โœ Scribed by P Peralta; K Obergfell; L Llanes; C Laird; T.E Mitchell

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
559 KB
Volume
21
Category
Article
ISSN
0142-1123

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โœฆ Synopsis

Fatigue tests were carried out on copper polycrystals that had a texture with strong components along directions inside the standard stereographic triangle (single slip orientations in monocrystals). The experiments showed that this "single slip" texture, ramp loading as a mechanical pretreatment and extended cycling at a given stress to insure saturation provide the conditions to obtain a plateau in the Cyclic Stress-Strain Curve (CSSC) of copper polycrystals in a reproducible fashion. Transmission Electron Microscopy (TEM) studies revealed the presence of numerous Persistent Slip Bands (PSB's) in samples deformed within the plateau regime.

๐Ÿ“œ SIMILAR VOLUMES

Effect of grain size and ramp loading on
Effect of grain size and ramp loading on the low amplitude cyclic stress-strain curve of polycrystalline copper
โœ L. Llanes; C. Laird ๐Ÿ“‚ Article ๐Ÿ“… 1990 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 335 KB

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