Grain boundaries are susceptible to cause boundary corrosion, cracking, and creep deformation. Single crystals are presently used in turbine engines. A micromechanic analysis is shown to explain the occurrence of highly localized plastic strain in the slip band known as the shear band in metals under a monotonic loading. Based on the prior analyses of fatigue bands in polycrystals, a micromechanic analysis of a single crystal under plane deformation is developed. The Bauschinger effect and hysteresis loops of these single crystals were calculated and shown. The calculated results agree generally with experimental observations. [S0021-8936(00)02202-9]
Issue Section:
Technical Papers
Keywords:
micromechanics,
hysteresis,
fatigue,
slip,
plastic deformation,
Bauschinger effect,
metals
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by ASME
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