Defects in Carbon-Rich Ferrite of Cold-Drawn Pearlitic Steel Wires

Unraveling the effect of Gd doping on the structural, optical, and magnetic properties of ZnO based diluted magnetic semiconductor nanorods

“…The microstrain anisotropy observed in these nanorods is ascribed to the presence of point defects. 74,75 Similar behavior has been found for ZnO nanorods by Khanchandani et al 76 The obtained coherent domain size is 29.8 nm for pristine ZnO-NRs, while it equals to 28.9 for 6% Gd-doped sample. For all samples, one may perceive that the coherent domain sizes measured by W-H plot are greater than those calculated by Scherrer routine since the latter does not reect the impact of lattice defects on the XRD peaks broadening.…”

Segregation Stabilizes Nanocrystalline Bulk Steel with Near Theoretical Strength

“…the nanobeam TEM diffraction method shows that no overlap of subgrains occurs in the direction normal to the TEM observation direction, confirming the atom probe tomography results of a columnar structure. Figure 4(a) shows the measured tensile strengths versus the square roots of d L and d Sub plotted together with data taken from [27,28] for comparison (Hall-Petch relation). In the present context the Hall-Petch relationship has been widely used to describe the strength increase of pearlite by reducing the average lamellar spacing between the ferrite and the cementite phases.…”

“…Literature data for eutectoid (0.80 wt. % C)[28] and hypereutectoid (0.94 wt. % C) pearlitic steel[27] are shown for comparison.…”

Mechanisms of subgrain coarsening and its effect on the mechanical properties of carbon-supersaturated nanocrystalline hypereutectoid steel

“…the decomposition of the hard phase-cementite-surprisingly does not adversely affect the material's strength. On the contrary, the tensile strength continuously increases upon cold drawing [3,4,20], even when the cementite has been significantly dissolved [3,18,19]. It is worth noting that the mechanism of deformation-induced cementite decomposition is still under dispute.…”