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The maximum shear stress level is quite higher in the <1,1,1> crystal than in the <1,0,0> crystal. Our numerical simulation results agrees with the general observation that <1,1,1> crystals are more difficult to grow than <1,0,0> crystals.
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Ratio of the von Mises invariant to the CRSS (excess stress field) in the crystal, in a cross section located 50 mm above the tri-junction: top, <1,0,0> crystal; bottom, <1,1,1> crystal.
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