Fretting is a significant cause for the failure of orthopedic implants. Currently, since magnesium and its alloys have been developed as promising biodegradable implant materials, the fretting behavior of the Mg alloys is of great research significance. In this study, a Mg-Nd-Zn-Zr alloy (hereafter, denoted as JDBM alloy) was selected as experimental material, and its fretting behaviors were ev...

The article studies the tribological properties of multicomponent nanostructured coatings Zr-ZrN-(Zr,Cr,Al)N and Zr-ZrN-(Zr,Mo,Al)N, as well wear resistance fracture behaviour cutting tools with mentioned during turning Inconel 718 alloy. Ti–TiN-(Ti,Cr,Al)N coating was also considered a reference coating. While is characterized by high hardness, it demonstrated coefficients friction (COF) at te...

STATEMENT OF PROBLEM Information is lacking about the fatigue resistance of computer-aided design and computer-aided manufacturing (CAD-CAM) tooth-colored implant custom abutment materials. PURPOSE The purpose of this in vitro study was to investigate the reliability of different types of CAD-CAM tooth-colored implant custom abutments. MATERIAL AND METHODS Zirconia (Lava Plus), lithium disi...

Amorphous complexions in nanocrystalline metals have the potential to improve mechanical properties and radiation tolerance, as well resistance grain growth. In this study, stability of amorphous binary ternary Cu-based alloys is investigated by observing effect cooling rate from high temperature on occurrence amorphous-to-ordered complexion transitions. Bulk Cu-Zr Cu-Zr-Hf alloy samples were a...

The use of predictive models to examine defect production and migration in metallic systems requires a thorough understanding the energetics formation migration. In fully miscible alloys, atomistic properties will all have range values that are heavily dependent on local atomic configurations. this work we used simulation tool Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) i...

Amorphous alloys show interesting mechanical properties as well unique physical and chemical due to their atomic stacking structure. However, when partial crystallization occurs in amorphous alloys, it can impact the of original alloy. To study phenomenon Zr-based alloy, a three-dimensional alloy atomic-stacking model was established by molecular dynamics simulations, structure evolution Zr-Cu ...

Zr is an important element to improve the heat resistance of aluminum alloys, which usually added alloys using Al-Zr master alloys. The microstructure has a significant impact on properties Zr-bearing In this paper, commercial Al-5Zr was examined, and effect remelting temperature cooling rate solidification structure remelted investigated, aiming develop feasible way for quality improvement res...

Zr, Nb, and Ta as alloying elements for Ti alloys are important for attaining superior corrosion resistance and biocompatibility in the long term. However, note that the addition of excess Nb and Ta to Ti alloys leads to higher manufacturing cost. To develop low-cost manufacturing processes, the effects of hot-forging and continuous-hot-rolling conditions on the microstructure, mechanical prope...

Microstructure and phase composition of a CrMo0.5NbTa0.5TiZr high entropy alloy were studied in the as-solidified and heat treated conditions. In the as-solidified condition, the alloy consisted of two disordered BCC phases and an ordered cubic Laves phase. The BCC1 phase solidified in the form of dendrites enriched with Mo, Ta and Nb, and its volume fraction was 42%. The BCC2 and Laves phases ...

Six types of diamond-like carbon (DLC) coatings with zirconium (Zr)-containing interlayers on titanium alloy (Ti-6Al-4V) were investigated for improving the biotribological performance of orthopedic implants. The coatings consist of three layers: above the substrate a layer stack of 32 alternating Zr and ZrN sublayers (Zr:ZrN), followed by a layer comprised of Zr and DLC (Zr:DLC), and finally a...