Deformation of Polycrystalline Metal Composed of Anisotropic Crystals Having Various Stress-Strain Curves
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The effect of stress-strain curve on the deformation behavior of polycrystalline metal composed of anisotropic crystals is investigated from energy aspect. The constraint between grains is discussed in the cases that the stress-strain relations are represented by (1) combination of straight lines, and (2) exponential curve. It is pointed out that the mutual constraint between grains is affected by the shapes of stress-strain curves, as well as the anisotropy or the distribution of orientations of grains. It is also concluded that the deformation of polycrystals changes its mode from constant stress to constant strain as the total strain becomes greater and as the grain size becomes smaller.
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