The effects of multi-step hot deformation conditions on the rheology of different metals, a high carbon steel, a stainless steel and a Nickel-based superalloy, are investigated through physical simulation tests. In these experiments, the thermal and mechanical events occurring during multi-step forging operations are accurately reproduced on real-material samples. The approximations in calculating the material flow strength that are introduced by conventional testing procedures based on iso-thermal and constant strain-rate tests are evaluated and discussed. The suitability of simple two-steps upsetting experiments to analyse material rheology in industrial processing conditions is assessed.
Rheological Behaviour in Multi-Step Hot Forging Conditions
BARIANI, PAOLO FRANCESCO;BERTI, GUIDO;BRUSCHI, STEFANIA;
2001
Abstract
The effects of multi-step hot deformation conditions on the rheology of different metals, a high carbon steel, a stainless steel and a Nickel-based superalloy, are investigated through physical simulation tests. In these experiments, the thermal and mechanical events occurring during multi-step forging operations are accurately reproduced on real-material samples. The approximations in calculating the material flow strength that are introduced by conventional testing procedures based on iso-thermal and constant strain-rate tests are evaluated and discussed. The suitability of simple two-steps upsetting experiments to analyse material rheology in industrial processing conditions is assessed.Pubblicazioni consigliate
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