Crystallographic Orientation Relationships between the Primary and Secondary Recrystallized Grains Multi-Layer Molybdenum Crystals

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  • Crystallographic Orientation Relationships between the Primary and Secondary Recrystallized Grains in Multi-Layer Molybdenum Crystals.
  • Crystallographic Orientation Relationsh

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A large-scale and multi-layer crystal was prepared from hot-rolled multi-laminated molybdenum sheet doped and stacked alternately with different amounts of dopant by means of secondary recrystallization. It was found that the potential nucleus of the secondary grain from layers with different amounts of dopant occurred first at layer with a small amount of dopant and then grew into the layer with a large amount of dopant during a higher temperature annealing. The orientation of secondary grain developed from each layer was also closely related to the texture gradients in the thickness direction for primary recrystallized sheet. Most of the orientation of multi-layer crystal sheet corresponded to very weak components in the primary recrystallization textures and were related by a rotation of approximately 15°C-30°C about <100> and <110> axes relative to the strong primary {001}<110> and {111}<112> components. Consequently, the main orientations of the secondary grains developed from quintuple-layer molybdenum crystal are composed of a near {100}<001> for the surface layer, a near {112}<111> for the central layer and a near {113}<332>+{112}<111> for the layer between surface and central ones.

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