Abstract :
Recent interest in nanostructured materials
stems, not only from their potential use in a variety of
applications, but also from the reported discovery of
novel fundamental phenomena. The consolidation
of cryomilled powder provides a potential pathway
towards large scale manufacturing of nanostructured
metallic materials. This approach typically engenders
the mechanical attrition of powders in liquid nitrogen,
followed by consolidation, using established
commercial techniques, such as isostatic pressing and
extrusion. In this overview paper, published data are
reviewed and discussed with particular emphasis on the
following topics: nanostructure evolution mechanisms;
primary consolidation and secondary processing
methods; thermal stability of cryomilled materials;
and mechanical behavior of consolidated materials.
Recent mechanical behavior data and the associated
mechanisms of cryomilled Al alloys are discussed in an
effort to shed light into the fundamental behavior of
ultrafine grained and nanostructured materials.
