Influence of Radial-Shear Rolling Conditions on the Metal Consumption Rate and Properties of D16 Aluminum Alloy Rods

The effect of five cases of temperature-and-speed conditions in radial-shear rolling (RSR) of D16 alloy is analyzed. The temperature of the rod after each pass is obtained from the simulation results. With decrease in the heating temperature of the billet, the self-heating temperature of the rod during RSR increases. Depending on the selected temperature, rolling speed, reduction per pass, and rod dimensions, the temperature change relative to the initial heating can be more than 100°C. The length and volume of the back-end defect are calculated for each of the temperature-and-speed conditions. With increase in the elongation ratio, the length of the back-end defect increases, and its volume decreases. The smallest back-end defect is observed in rods produced gradually decreasing the rolling temperature in each pass (for a 6 m rod, the scrap losses are 2.2% of the volume of rolled metal). For one of the temperature-and-speed conditions, the specific deformation energy consumption that does not exceed 24–35% of the total energy consumption is obtained. The rods produced by RSR have better strength and plasticity (σ_B = 452–486 MPa, σ_y = 262–290 MPa, δ = 13.0–16.5%) than those required by the GOST 21488–97 State Standard.