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The precipitates are hexagonal-shaped within the (0001)//(111) habit plane, with edges parallel to the close-packed [11-20]//[1-10] directions. Thus, when the precipitates are oriented edge-on in a [11-20]//[1-10] zone axis, their edges are parallel to the electron beam and the exact length of the plates (facet-to-facet) can be measured without any effects of geometry or truncation in the foil.


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BF TEM image of an edge-on g plate in a sample aged at 400 ¡æ for 120 s and 160 ¡æ for 48 h, with a matrix containing GP zones


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The precipitates are hexagonal-shaped within the (0001)//(111) habit plane, with edges parallel to the close-packed [11-20]//[1-10] directions. Thus, when the precipitates are oriented edge-on in a [11-20]//[1-10] zone axis, their edges are parallel to the electron beam and the exact length of the plates (facet-to-facet) can be measured without any effects of geometry or truncation in the foil.
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