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Explain why the properties of polycrystalline materials are often isotropic?
Wiki User
∙ 11y ago
Most polycrystalline materials consist of randomly arranged crystals or "grains." Although individual grains have
different orientations and behave anisotropically by themselves, at a larger scale the material behavior is determined
by the sum of many grain orientations, and the bulk material acts in an isotropic manner. There are some notable
exceptions to this generalization. If the crystals or grains in a solid material are all aligned in the same or similar
directions (called "columnar" orientation of grains), as is the case in some turbine blades, the crystal will exhibit
anisotropic behavior.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoMost polycrystalline materials consist of randomly arranged crystals or "grains." Although individual grains have different orientations and behave anisotropically by themselves, at a larger scale the material behavior is determined by the sum of many grain orientations, and the bulk material acts in an isotropic manner. There are some notable exceptions to this generalization. If the crystals or grains in a solid material are all aligned in the same or similar directions (called "columnar" orientation of grains), as is the case in some turbine blades, the crystal will exhibit
anisotropic behavior.
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