Texture and room-temperature formability of rolled Mg-1.5Zn-xCe alloys

Abstract

The texture and room-temperature formability of rolled Mg-1.5Zn alloys containing different contents of Ce were inves-tigated by experiment, it is indicated that during the same hot rolling and annealing processes, Ce addition can effectively modify and weaken the texture. When 0.2wt% Ce is added, the Mg-1.5Zn alloy has excellent room-temperature formability, and its maximum texture intensity is only 2.20. This alloy exhibits the transverse direction split texture, whose basal pole is tilted by about ±35° from the normal direction toward the transverse direction. At room temperature, the Erichsen value reaches 5.46, and the ultimate elonga-tion in the rolling direction is 23.2% with a low planar anisotropy value of 0.01. However, 0.5% and 0.9% Ce additions promote the formation of huge secondary phase particles, resulting in an increase in the intensity of the basal texture, a decrease in the Erichsen value, and deterioration in the room-temperature stretch formability.

Keywords

• magnesium alloys
• rare earth addition
• cerium
• texture
• formability