In the case of single crystals, the strength depends on the spatial orientation of the crystal structure. Ideally, the single crystal is aligned for high strength in such a way that slip planes are as difficult to activate as possible (i.e. not at 45°, as the greatest shear stresses occur at this angle -> see Schmid's law). The strength of single crystals can then be significantly higher than that of polycrystalline materials if they are aligned correctly. Due to their high strength, single crystals are therefore also used for turbine blades.
Does the ultimate strength of single crystal reach as high as that of a polycrystalline material?
In the case of single crystals, the strength depends on the spatial orientation of the crystal structure. Ideally, the single crystal is aligned for high strength in such a way that slip planes are as difficult to activate as possible (i.e. not at 45°, as the greatest shear stresses occur at this angle -> see Schmid's law). The strength of single crystals can then be significantly higher than that of polycrystalline materials if they are aligned correctly. Due to their high strength, single crystals are therefore also used for turbine blades.
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