. Dans-un-polycristal, plusieurs grains peuvent avoir la même orientation ou des orientations voisines. L'orientation préférentielle du polycristal est alors I'orientation g(V,O,g) que I'on retrouve le plus souvent parmi I'ensemble des grains qui le compose. La détermination de ces orientations préferentielles passe par : -la mesure de figures de pôles experimentales

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