The article is mainly concerned with radial-axial ring rolling (RARR) process of AM60 magnesium rings at elevated temperatures.First, several tubes were cast using centrifugal casting. Afterward, the cast tubes were machined and cut into primary rings for therolling process. Duration of all the ring rolling tests was constant (20 s). The RARR operation was performed at three elevatedtemperatures of 200, 250 and 300 °C and with three different rotational speeds of 40, 60 and 80 rpm for the driven (main) roll. Todetermine the stress-strain curves of the centrifugally cast and the rolled rings, several compression tests were performed with samplesin rolling direction, transverse direction and normal direction. The experimental results showed that the initial temperature of the ringand the rotational speed of the driven roll represented inverse effects on the mechanical properties, such as strength and hardness, ofthe rolled rings. The relation between the average grain sizes of specimens with their mechanical properties was in agreement with theHall–Petch relation. Using the design of experiments technique, the main effects of temperature and rotational speed as well as theirinteraction on different mechanical and microstructural properties of the rolled rings were also investigated. Finally, several regressionmodels were derived to predict various material properties of the rolled rings in terms of the temperature and rotational speed.
