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During the last decade equal‐channel angular pressing (ECAP) has emerged as a widely used fabrication route of ultrafine‐grained (UFG) metals and alloys. Enhanced mechanical properties of UFG materials produced by severe plastic deformation, with a grain size smaller than 1 µm, have been reported in a large number of publications. However, the higher strength does not imply higher resistance to fatigue...
EUROFER 97 steel is a candidate structural material for future fusion reactors and Test Blanket Modules (TBMs). In the present work microstructure of Eurofer 97 was modified by hydrostatic extrusion in multi‐step process with total true strain exceeding 3. TEM observations showed that HE causes significant grain refinement from about 400 to 80 nm. This is accompanied by improvement of the tensile...
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