Show simple item record Liu, Wei en_US 2007-06-01T19:24:11Z 2007-06-01T19:24:11Z 2000-01-01T00:00:00Z en_US
dc.description.abstract The absence of complete and reliable results on the effects of the grain size on the cyclic behavior for polycrystalline copper determines the main objective of the present study, which was conducted in an attempt to address the reason for the existing scatter in the literature. The grain size effect on low cycle fatigue (LCF) behavior of copper polycrystals was studied at room temperature under symmetric tension-compression cycling at constant total strain amplitude control with a low constant plastic strain rate. Sets of specimens with different grain sizes were cyclically tested, over a range of plastic strain from 5 * 10-6 to 5 * 10-3, up to saturation. The obtained saturation stresses were plotted as a function of corresponding plastic strain amplitudes to obtain a cyclic stress strain curve (CSSC) for each grain size. Finally, all the cycled specimens were sectioned and cut longitudinally in the mid-section of the specimens to produce samples for microscopic investigation. Scanning electron microscopy(SEM) was conducted on the etched samples for the evidence of persistent slip bands (PSBs). (Abstract shortened by UMI.) en_US
dc.format.extent 4363396 bytes
dc.format.extent 184 bytes
dc.format.mimetype application/pdf
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dc.language en en_US
dc.language.iso en_US
dc.rights info:eu-repo/semantics/openAccess
dc.title Grain size effect on low cycle fatigue behavior of copper polycrystals en_US
dc.type info:eu-repo/semantics/masterThesis
dc.type master thesis en_US Mechanical & Manufacturing Engineering en_US Master of Science (M.Sc.) en_US

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