Abstract
The constitutive behavior of aluminum alloy 7075 was characterized using compression tests performed over a wide range of temperatures (350–600 °C, from warm deformation temperature to semi-solid region) and strain rates (10−3–1 s−1). This work is of significance for the development of compound forming which combines plastic forming and semi-solid processing. The constitutive behavior in the wide temperature range was divided into two types: plastic deformation when the alloy is in solid state and containing a small fraction of liquid (350–490 °C); thixotropic deformation when the alloy is in the semi-solid state (above 490 °C). An adjusting factor which denotes the effect of liquid on the constitutive behavior was proposed. The constitutive model of peak stress as a function of temperature and strain rate was obtained for the wide range of temperatures (350–600 °C). The average relative errors between the calculated and measured values are 3.88% (350–490 °C) and 4.189% (above 490 °C), respectively.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call