Journal
NANOTECHNOLOGIES IN RUSSIA
Volume 5, Issue 1-2, Pages 108-122Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1995078010010118
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The principles of fabricating nanostructured bulk and sheet materials by the methods of multiple isothermal forging and warm rolling are formulated. The first method, which is based on dynamic recrystallization, allows one to obtain bulk materials with a uniform nanostructure. The second method makes it possible to transform the latter into a sheet semi-product retaining this nanostructure. Using the example of titanium alloy, it is demonstrated that, when reducing the grain size down to the nanostructure level in a sheet material, technological operations on it-such as pressure welding and superplastic forming-can be performed at significantly lower temperatures than with the use of sheet materials with conventional fine-grained structures. This opens up new possibilities for fabricating hollow structures by a progressive method combining pressure welding and superplastic forming. Using the example of hollow blades, the development of nanotechnologies and nanomaterials for use in industry is demonstrated.
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