Abstract The microstructure and local micromechanical properties of a Ni-based superalloy thin film produced by magnetron sputtering using ERBO/1 sputter targets were investigated. consists columnar nanograins (an average size ~ 45 nm) with mostly < 111 > orientation. Inside the nanograins, very fine nanotwins an thickness 3 nm are present. In-situ micropillar compression tests, complemen...

In this study, NiAl bronze (NAB) alloys are processed using an ultrasonic vibration-assisted milling (UVAM) surface engineering technique. The strengthening mechanisms at different cutting speeds analysed through well-established models and experiments. increase in speed produced decrements of 29.5%, 26.6%, 5.6% the friction torques, accumulated dissipated energy, worn area, respectively. micro...

The high-rate sensitivity of nanostructured metallic materials demonstrated in the recent literature is related to the predominance of thermally activated deformation mechanisms favoured by a large density of internal interfaces. Here we report time-resolved high-resolution electron transmission microscopy creep tests on thin nanograined films using on-chip nanomechanical testing. Tests are per...

In this paper, we report atomic scale observations and formation mechanisms of a high-density antiphase boundaries (APBs) within an ultra-fine-grained Fe4Al13 intermetallic layer at Al/steel interface after heat treatment 596 °C. The results reveal that the APBs are formed by nucleation glide partial dislocations with Burgers vector b/3[010] (b = 12.47 Å). intensive activation locally transform...

We studied nucleation and growth of Ag precipitates in a Cu-6 wt%Ag-0.15 wt%Sc alloy found that the early was similar to continuous precipitation it occurred only on dislocations within Cu grains, not any grain boundaries. In aged samples, we observed stacking faults extended into nanotwins. These planar defects formed during surrounding matrix. The formation released misfit strain Cu/Ag interf...

In the present work, Nbx-CoCrFeMnNi high entropy alloy films (HEAFs, 0 to 7.2 at.% Nb) were fabricated by radio frequency (RF) magnetron co-sputtering of CoCrFeMnNi and Nb targets. The effects addition on microstructures mechanical properties HEAFs systematically investigated. For Nb-free film (0 Nb), face-centered cubic (FCC) peaks identified in X-ray diffraction (XRD) pattern. resulted a broa...