Research into structure and rheological and relaxation properties of nanocrystalline beryllium at temperatures of hot rolling and research into stress relaxation kinetics in different sorts of beryllium
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Rheological and relaxational properties of distillate and technical beryllium were studied. It was shown that strengthening and thermal softening processes in nanocrystalline beryllium significantly differ from the same processes in distillate and technical beryllium. Thermal softening in distillate and technical beryllium takes place only at the holding time between deformations; in case of nanocrystalline beryllium, thermal softening takes place during the deformation process. It was considered that beryllium plastic deformation at 400–500°C involves an additional mechanism of deformation and stress relaxation: twinning; this mechanism increases the metal plasticity.
KeywordsStress Relaxation Beryllium Thermal Softening TWIP Steel Deformation Degree
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