Texture Control in a Fe-Al-N Alloy by Thermomechanical Processing

A drastic change from the {310}<001> component to the Goss component in the recrystallized textures between (111)[T12] Mo single crystals zone-refined once and three times is confirmed to be due to the presence of the second phase particles before rolling deformation by means of transmission electron microscopy. A dispersion of the fine particles is enough effective to suppress the formation of the recrystallization Goss texture. The rates of heating for recrystallization also have some effects on the formation of the recrystallization textures. For example, a rapid heating tends to increase the Goss component.A mechanism how the presence of the fine particles before rolling deformation inhibits the formation of Goss oriented recrystallized texture is discussed in detail. The large angle grain boundary is formed between the fine Goss structure and the rolled matrix with the (111)[T12] orientation at the first stage of recrystallization, because the fine structure is a minute region with a very steep strain gradient in the rolled matrix. Whereas in the case of {310}<001> oriented fine structure, which is considered to be a minute region with relatively mild strain gradient, the small angle grain boundary is expected to form at the first stage of nucleation. This difference between the two fine structures seems to have a great effect on the formation of the recrystallization textures even in the case of which the dispersion of the fine particles exists before rolling deformation.A discussion is made from the viewpoints of the free energy balance inside the fine structures and the retarding effect of the dispersion of the fine particles on the grain boundary movement in the process of nucleation.

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Texture Control in a Fe-Al-N Alloy by Thermomechanical Processing

Cited by 2 publications

References 3 publications

Effect of zone-refining on orientations of recrystallized grains formed in rolled and annealed pure Mo and Ta single crystals

Effect of zone-refining on orientations of recrystallized grains formed in rolled and annealed pure Mo and Ta single crystals

Effect of Fine Precipitates on the Recrystallization Textures of Mo Single Crystals Rolled in the (111)[\bar1\bar12] Orientation

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