Effect of aging on microstructural development in an Al–Mg–Si alloy processed by high-pressure torsion

Evidence for superplasticity in a CoCrFeNiMn high-entropy alloy processed by high-pressure torsion

“…Two miniature tensile specimens were cut from symmetric off-centre positions in each disk in order to avoid any inhomogeneities in the central regions of the disks [22]. These specimens were prepared by electro-discharge machining with gauge dimensions of 1.1 × 1.0 × 0.6 mm 3 and the mechanical properties were examined at temperatures from 773 to 1073 K. The stressstrain curves were recorded at each temperature using initial strain rates from 1.0 × 10 -3 to 1.0 × 10 -1 s -1 with at least two samples tested under each condition to ensure good reproducibility and with the testing conducted at constant displacement rates.…”

Significance of grain refinement on microstructure and mechanical properties of an Al-3% Mg alloy processed by high-pressure torsion

“…A set of miniature tensile specimens was cut from the disks with gauge lengths and widths of 1 mm using electro-discharge machining (EDM). In practice, two separate tensile specimens were machined from off-center positions in each disk as demonstrated in an earlier report [14], thereby minimizing any effects that may be introduced by the occurrence of microstructural inhomogeneities near the center of each disk. For comparison purposes, a set of similar miniature specimens was also prepared from the as-annealed alloy prior to HPT processing.…”

Effect of applied pressure on microstructure development and homogeneity in an aluminium alloy processed by high-pressure torsion

“…Using EDM, two miniature tensile samples with gauge lengths of 1.0 mm were cut from each disc from off-centre positions located 2.5 mm from the central points as shown in Fig. 1, where the centre of each disc was not included in order to avoid any inhomogeneities that may exist in the vicinity of this central region [36]. Tensile tests were conducted using a Zwick/Roell 005 testing machine at an initial strain rate of 1.0 × 10 −3 s −1 .…”