Porosity dependence of mechanical properties of titanium nanofoams.

Context: This study employs molecular dynamics (MD) simulations to investigate the mechanical properties and deformation mechanisms of titanium (Ti) nanofoam under uniaxial tensile loading. The effects of porosity (ranging from 20 to 50%), strain rate (from 5 × 10⁸ to 5 × 10⁹ s⁻), and temperature (from 300 to 900 K) on the tensile response are systematically examined. The results reveal that increasing porosity significantly reduces the ultimate tensile strength (UTS) and elastic modulus, while intensifying localized shear strain and stress concentration.

Deformation and phase transformation of dual-phase Ti under tension and compression process.

Context: This study utilizes molecular dynamics (MD) simulation to investigate polycrystalline dual-phase titanium (DP Ti) deformation behavior and phase transformation under tensile and compressive loading. The analysis focuses on the influence of hexagonal close-packed (HCP) phase fraction, strain rate, and temperature on the mechanical properties and microstructural evolution. The results indicate that increasing the HCP phase fraction enhances the elastic modulus (36.

Nanoscale friction behavior and deformation during copper chemical mechanical polishing process.

Context: The mechanical characteristics and deformation behavior of Cu material under the nanoscratching through a diamond tooltip on the workpiece are studied using molecular dynamics (MD) simulation. Effects of scratching velocity, scratching depth, workpiece temperature, and grain size on the total force, shear strain, pile-up, shear stress, workpiece temperature, and phase transformation are investigated. The results reveal that increasing the scratching velocity leads to higher oscillation in total force, greater shear strain and shear stress, higher pile-up on the workpiece surface, and higher workpiece temperatures.