journal article·2018-06-13

Grain refinement of micrometer-scale Cu foils through accumulative cyclic deformation

F Liang, C Y Dai, G P Zhang

Materials Research Express· Volume 5· Issue 6
Publisher page

Abstract

The microstructure evolution of the 190 μ m-thick Cu foils subjected to repeatedly bending loading was investigated. We found that the grains in the micron-scale foil were refined into subgrains with a size of about 0.5 μ m through a removal of twin boundaries and an introduction of a high frequency of high angle boundaries (>15°) with accumulative cyclic deformation. With increasing strain rate (loading frequency), the grains are completely refined into well-defined fine grains with high angle boundaries. Such the microstructure refinement induced by accumulative cyclic deformation may provide a potential strategy for grain refinement of small-scale materials.
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Research context

OpenAlex topics: Microstructure and mechanical properties · High-Velocity Impact and Material Behavior · Surface Treatment and Residual Stress

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