Implantation-plasma nitriding

High Energy Surface Implantation by Ion Nitrogen of Ultra- Fine Grained Ti-6Al-4V Alloy for Engineering Application

“…One of the promising processes of surface modification is high energy surface implantation with nitrogen ions. Ionized atoms and molecules penetrate into the target crystalline lattice and form the alloys, the composition of which is practically independent of the solubility limits and diffusive constants [5,6]. Thereby, it is possible to create composite systems with unique structures and properties in the surface material, which are significantly different from properties of the base material.…”

Enhanced fatigue properties of Ti-6Al-4V alloy turbine blades via formation of ultra-fine grained structure and ion implantation of surface

“…On the average, the depth of N + penetration in the surface does not exceed 6 µm. As is known that the value of the layer modified with N + in Ti alloy at low-energy ion implantation can vary from 4 to 10 µm depending on the structure state of the surface and radiation dose [8][9][10]. Fig.…”

“…In particular, the surface modification of conventional Ti-6Al-4V alloy by ion implantation with N + enables improving its tribological [11], corrosion properties [12], creep rupture strength at 600С [13]. As is known that ionized atoms or molecules of an alloying substance in the surface layer form a complex dislocation substructure, and ions introduced in the crystalline lattice of a metal base form solid solutions or new chemical compounds [9,10]. Unlike coarse-grained (CG) materials, nucleation and accumulation of new dislocations are constrained in ultrafine grains with a high dislocation density [14].…”

“…Among successful and promising techniques of surface treatment in structural materials are the techniques connected with impact of concentrated energy flows, to which ion implantation belongs [8][9][10][11][12][13]. The physical entity of ion implantation is introduction (implantation) of an alloying element in the surface layer of a part as a result of bombardment by ions with high kinetic energy [9,10]. In particular, the surface modification of conventional Ti-6Al-4V alloy by ion implantation with N + enables improving its tribological [11], corrosion properties [12], creep rupture strength at 600С [13].…”

“…to external loads. Among successful and promising techniques of surface treatment in structural materials are the techniques connected with impact of concentrated energy flows, to which ion implantation belongs [8][9][10][11][12][13]. The physical entity of ion implantation is introduction (implantation) of an alloying element in the surface layer of a part as a result of bombardment by ions with high kinetic energy [9,10].…”