Grain Refinement of Commercial Al-Mg Alloy Using Severe Torsion Straining Process

Microstructural Evolution of Severely Plastically Deformed Sensitized Aluminum 5456‐H116 Treated by Ultrasonic Impact Treatment

“…The observed nanocrystalline structure at the UIT surface in Figure concurs with work by several authors regarding nanocrystalline grain growth due to SPD . Our TEM investigation shows that the nanocrystalline layer is near surface and is only present to a depth that is equivalent to the thickness of the deformation layer (10–18 µm).…”

“…SPD techniques such as UIT, equal channel angular pressing (ECAP), and high pressure torsion (HPT) have been shown to form nanograins in aluminum alloys . The nanocrystalline layer is near surface with subgrains observed at regions of various depths below the surface.…”

Interface sheet-constrained groove pressing as a modified severe plastic deformation process

“…In the top-down approach, the microstructure of the bulk material is changed to nanostructure utilising severe plastic deformation (SPD) [2]. SPD is powerful process for grain refinement, and numerous techniques was invented, such as, equal channel angular pressing (ECAP) [3,4], high pressure torsion (HPT) [1], multidirectional forging (MDF) [5], twist extrusion (TE) [6,7], severe torsional straining (STS) [1,[8][9][10][11], cyclic extrusion compression angular pressing (CECAP) [12], tubular channel angular pressing (TCAP) [13,14], Accumulative Roll Bonding (ARB) [15], and constrained groove pressing (CGP) [16].…”