Controlling mechanisms of deformation of AA5052 aluminium alloy at small strains under hot working conditions
- Carmona, R.
- Zhu, Q.
- Sellars, C. M.
- Beynon, J. H.
DOIAbstract
The objective of the present work was to investigate the thermomechanical behaviour of a commercial Al-Mg alloy and to understand the deformation mechanisms taking place at small strains (<0.2) and high temperatures (≥300 degreesC) at strain rates relevant to hot working conditions (0.01-10 s-1). The experimental approach addresses different effects of testing machines on the load-displacement measurements. The results show distinct sorts of behaviour depending on the Zener-Hollomon parameter (Z): normal continuous increase in the stress with strain for high values of Z and a rise followed by a drop in stress with increasing strain for low values of Z. For steady-state behaviour, the relationship between stress and strain rate follows...
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