Authors: W Q Li Q X Ma
Publish Date: 2015/02/03
Volume: 79, Issue: 1-4, Pages: 255-263
Abstract
It is a complex coupling of multiphysics field for the manufacture of forged components under the condition of adhesive friction which has been studied in this paper A program of experimental work directed by upsetting method has been carried out to determine rheological behavior and friction performance for a range of press amounts from original specimen to half in height in the state of adhesive friction Based on the transient displacement obtained by upsetting simple mathematics methods were applied for the analysis of rheological behavior and the measurement of friction factor Deformed flow stress strain hardening behavior and frictional shear stress were quantitatively identified inversely by combining the results of ring and cylinder upsetting meanwhile material stress–strain curves without the influence of friction were elaborated by using the extrapolation method Furthermore the characteristics of inverse flow behavior under the condition of adhesive friction and the vanishing time of adhesive friction were determined by means of investigating the orientation of velocity field Finally a new theory of bidirectionality theory relevant to metal deformed flow was proposed to illustrate and predict rheological behavior of forged components
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