Examination of an aluminum alloy behavior under different routes of twist extrusion processing

Experiments were conducted to evaluate the effects of loading path during twist extrusion processing. The samples of aluminum 8112 were processed by different routes of twist extrusion. Two consecutive clockwise dies (route I) and alternative clockwise–counterclockwise dies (route II) were used. The grain sizes created by route II were significantly finer than those created by route I. Furthermore, the mechanical properties, including the strength and hardness, not only enhanced but also distributed more homogeneously across the transverse cross-section of the samples.

► Strength and microhardness enhance by performing both routes I and II.
► Grain size decrease by performing both routes I and II.
► Route II homogenizes the mechanical properties more than route I.
► Route II results in more grain refinement than route I.