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Some Physical Characteristics of Strain Hardening in Severe Plastic Deformation

Abstract : It is shown here using group theory principles that the Hencky strain is not an appropriate measure for tests involving simple shear, for which the von Mises formulation should be used exclusively. It is also shown analytically that the application of self-similarity principles to Stages III-IV indicates that these obey power laws, while the same principles do not apply to the other stages. As a result, they do not develop self-similar microstructures. Finally, the effect of strain path on the work hardening rates themselves is also examined. It is shown that the lowest rates are again associated with simple shear because this is the path along which the number of intersecting slip systems is the lowest.
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Submitted on : Wednesday, April 26, 2017 - 6:27:40 PM
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Yan Beygelzimer, Laszlo S. Toth, John J. Jonas. Some Physical Characteristics of Strain Hardening in Severe Plastic Deformation. Advanced Engineering Materials, Wiley-VCH Verlag, 2015, 17 (12, SI), pp.1783-1791. ⟨10.1002/adem.201500097⟩. ⟨hal-01514965⟩

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