Clarification of the effect of temperature and strain rate on workpiece deformation behaviour in metal forming processes

In analysing metal forming processes the deformation mechanism map (elastic-plastic, elastic-viscoplastic, or creep type behaviour) for a particular process is commonly built solely in relation to temperature; which can be acceptable for a defined modest strain rate range. However, for a given temperature, if strain rate variation is large, the deformation mechanism could vary significantly. In this paper, a deformation mechanism map is proposed to clarify the interacting effect of deformation conditions (temperature and strain rate) on workpiece behaviour in metal forming processes. Rate type deformation equations which can be used to comprehensively model the effect of temperature and strain rate on deformation mechanism characteristics are elucidated and as examples, determined for Ti-6Al-4V and Al-Mg alloy.

Automated summary

This paper proposes a deformation mechanism map to clarify the interacting effect of deformation conditions (temperature and strain rate) on workpiece behavior in metal forming processes. The rate type deformation equations, which comprehensively model the effect of temperature and strain rate on deformation mechanism characteristics, are elucidated. Additionally, examples of Ti-6Al-4V and Al-Mg alloy are used to demonstrate the application of these equations.