Abstract
Polycrystalline molybdenum 34%(at.) rhenium has been deformed by cold rolling. The variation in twin and dislocation microstructures produced by longitudinal, transverse, cross and pack rolling is reported. Deformation is initially accompanied by much twinning; twin formation being more difficult when the material is rolled in a direction transverse to the original rolling direction. A dislocation cell structure begins to form after about 10 per cent deformation by single direction rolling, but forms at a lower deformation by rolling in two directions. Within limits the dislocation cell size and wall thickness can be varied by the use of different rolling schedules. The structure of the pack rolled material is shown to be due to constraints imposed by the jacket. Failure of this material results from the growth of voids under an internal tension.
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