Equiaxed crystals

TL;DR: In this article, the authors show that the grain refinement process is driven by grain subdivision at the colder periphery of the tools deformation zone, and the geometric effects of strain, which together reduce the overall high angle boundary spacing with increasing deformation.

TL;DR: In this paper, the authors investigated the UFG microstructures in the surface layer of an aluminum alloy 7075 heavily worked by ultrasonic shot peening and found that the grain subdivision into the subgrains was the main mechanism responsible for grain refinement.

TL;DR: The residual microindentation (Vickers) hardness (HV) averaged 4.1 GPa, corresponding to a nominal yield strength of ∼1.4 GPa (∼HV/3), and a specific yield strength (specific yield strength) of 0.37 GPa cm3 g−1 (for a density of 3.76 g cm−3), in contrast to 0.27 GPa kg−1 for EBM-fabricated Ti−6Al−4V components.

TL;DR: In this article, the evolution of microstructure and the mechanical response of copper subjected to severe plastic deformation using equal channel angular pressing (ECAP) was investigated, and it was shown that the microstructures produced through adiabatic shear localization during high strain rate deformation and ECAP are very similar.

TL;DR: In this paper, the grain morphology evolution behaviors of laser-deposition titanium alloy components were investigated via basic study on solidification nucleation and growth mechanisms of the local melt pool during the layer-by-layer deposition process.