Effects of solutes on thermal stability, microstructure and mechanical properties in CrMnFeCoNi based alloys after high pressure torsion

Study on Bulge State of PCrNi3MoV Target Plates Penetrated by Square Fragments

“…The initial horizontal fibers were seriously distorted and compressed to align to the contact surface, as sketched by Figure 4d. Besides, the pile-up formation around the penetration hole is pronounced, as the plastic zone is confined and the material deforms to the free surface [16]. The target steel impacted by a fragment with a velocity of 597 m/s, as shown in Figure 4c, showed almost identical microstructure characters to Figure 4b, except some micro-cracks were identified around the contact region and marked by red arrows.…”

“…The initial horizontal fibers were seriously distorted and compressed to align to the contact surface, as sketched by Figure 4d. Besides, the pile-up formation around the penetration hole is pronounced, as the plastic zone is confined and the material deforms to the free surface [16]. The target steel impacted by a fragment with a The impact damage modes of the gun steel target plate were studied, which included cratering, compression, shearing, and tension.…”

Solid solution hardening effects on structure evolution and mechanical properties of nanostructured binary and high entropy alloys after high pressure torsion

“…For samples showing significant material pile-up during indentation, the contact area was corrected according to the procedure proposed by Kese et al [27] (further information regarding the correction procedure is shown in Ref. [18] for the Ni-X series). In IOP Publishing doi:10.1088/1757-899X/1249/1/012003 3 addition, indentation creep experiments were carried out using the constant contact pressure approach [25,26].…”

“…The IOP Publishing doi:10.1088/1757-899X/1249/1/012003 6 effect of alloying on the saturation grain size is not caused by the change in SFE, it is rather related to the change in grain boundary mobility [34]. In this respect, Keil et al [18] showed that the solute content strongly effects the grain growth kinetics in the Ni-X system with higher thermal stability for higher solute concentrations. Very low activation volumes for grain growth have been found in the low temperature regime, which was attributed to the modification of grain boundaries during severe plastic deformation [18].…”

“…In this respect, Keil et al [18] showed that the solute content strongly effects the grain growth kinetics in the Ni-X system with higher thermal stability for higher solute concentrations. Very low activation volumes for grain growth have been found in the low temperature regime, which was attributed to the modification of grain boundaries during severe plastic deformation [18]. Such grain boundaries in the deformation-affected state show higher diffusivities and pronounced strain fields compared to relaxed grain boundaries [35].…”