Bulk Nanostructured Refractory Metals with Enhanced Mechanical Properties Produced by Equal Channel Angular Pressing
Interim technical rept. no. 1, 10 Sep-11 Dec 2002
UFA STATE AVIATION TECHNICAL UNIV (RUSSIA) INST OF PHYSICS OF ADVANCED MATERIALS
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The air of the present project is to obtain a set of bulk billets 100 mm long with UFG structure made of refractory metals such as tungsten and tantalum. The previous positive experience of refining the tungstens structure using equal channel angular pressing ECAP was taken into account. For the production of bulk billets with UFG structure having a more long-lengthed size than those obtained in earlier works, it has been necessary to introduce modifications into the die-set being used and to carry out updating of the whole die-set for ECAP. That is why the main objective of the first stage was to find a new approach to the modernization of pressing process, to design and manufacture a new die set and to test its work, using relatively long billets made of hard-to-deform refractory metals.
- Fabrication Metallurgy