Crystallographic correspondence between the bcc and C14-type structures in the Fe–Ti alloy system

A study of precipitation in DO3 ordered Fe–Al–Nb alloy

“…7a, for example. Also of interest is a recent study by Hirata and Koyama [23], who examined C14 Laves precipitation in a Fe-Ti alloy. They deduced a slightly different orientation relationship between Laves precipitate and the bcc matrix, namely {0001} C14 //{110} matrix , and h10 10i C14 ==h112i matrix .…”

Laves Phase Formation in the Fe20Co18W Alloy Annealed at 800°C

“…4a). By this way, the [11][12][13][14][15][16][17][18][19][20] C14 direction is parallel to [-111] bcc and [0001] C14 is parallel to [1][2][3][4][5][6][7][8][9][10][11][12] bcc .…”

“…The C14 and bcc lattices were compared and a good matching between the two structures was considered. Using the projection along [11][12][13][14][15][16][17][18][19][20] C14 // [-111] bcc it was assumed that the [0001] C14 vector was equal to the [1][2][3][4][5][6][7][8][9][10][11][12] bcc vector, with a magnitude of 0.707 nm and that the ½[-1100] C14 vector was equal to the [-1-10] bcc vector, with a magnitude of 0.408 nm. A good match between the (11-20) C14 and (-111) bcc planes is important since they are believed to correspond to the habit plane of the plates.…”

“…The strengthening effect of particles depends on their effect on moving dislocations, and one important parameter is the orientation relationship of these particles with the matrix. A variety of orientation relationships have been found for the Laves phase in FeM alloys with M being Ti [2,4], Mo [5][6][7][8] or Nb [4,9]. The method used to determine the orientation relationship is always the indexation of electron diffraction patterns using one or several zone axes common to the body centered cubic (bcc) matrix Fe and the C14 Laves phase.…”

“…These special features are explained by the preferred crystallisation of the C14 phase along <11-20> C14 directions [5,7]. In some cases a precise description of the orientation relationship could be obtained and models describing the atom displacements for the formation of the Laves phase from the matrix were proposed [2,7]. Up to now few studies were devoted to the precipitation of the C14 phase in the FeW system [10].…”