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A new constitutive model for hot forging of steels taking into account the thermal and mechanical history

机译：考虑热和机械历史的钢热锻的新本构模型

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摘要

The paper presents a new constitutive model which accurately describes the rheological behaviour of steels in hot bulk metal forming operations both in single- and multi-step deformation conditions. In the proposed formulation the effects on the flow curve of all the significant phenomena accompanying the deformation process are accommodated and the previous thermo-mechanical history is represented through the average austenitic grain size measured immediately before the deformation. The number of coefficients to be evaluated is reasonably restricted and the testing required to this aim not too complex.
机译：本文提出了一种新的本构模型，该模型准确地描述了在单步变形和多步变形条件下热块状金属成形操作中钢的流变行为。在建议的配方中，考虑了伴随变形过程的所有重要现象对流动曲线的影响，并且通过紧接变形之前测量的平均奥氏体晶粒尺寸来表示先前的热机械历史。要评估的系数数量受到合理限制，并且为此目的所需的测试不太复杂。

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