Microstructure-based modeling of the impact response of a biomedical niobium–zirconium alloy

Abstract

This article presents a new multiscale modeling approach proposed to predict the impact response of a biomedical niobium-zirconium alloy by incorporating both geometric and microstructural aspects. Specifically, the roles of both anisotropy and geometry-based distribution of stresses and strains upon loading were successfully taken into account by incorporating a proper multiaxial material flow rule obtained from crystal plasticity simulations into the finite element (FE) analysis. The simulation results demonstrate that the current approach, which defines a hardening rule based on the location-dependent equivalent stresses and strains, yields more reliable results as compared with the classical FE approach, where the hardening rule is based on the experimental uniaxial deformation response of the material. This emphasizes the need for proper coupling of crystal plasticity and FE analysis for the sake of reliable predictions, and the approach presented herein constitutes an efficient guideline for the design process of dental and orthopedic implants that are subject to impact loading in service.

Triple-Bioinspired Burying/Crosslinking Interfacial Coassembly Strategy for Layer-by-Layer Construction of Robust Functional Bioceramic Self-Coatings for Osteointegration Applications

“…Both calcium and silicon are indispensable constitutes of bone tissues as well as useful regulators of osteogenic differentiation. , In particular, Si ions are very capable to simultaneously accelerate bone calcification and stimulate vascular structure formation. As to ionic Zr, it was shown to cause toxicity in millimolar (mM) dosages . However, at lower concentrations, as is in our case (∼1.1 ppb per day), Zr ions are nonharmful and even exert bioactivity on bone-forming cells via activating BMP signaling .…”

“…As to ionic Zr, it was shown to cause toxicity in millimolar (mM) dosages. 63 However, at lower concentrations, as is in our case (∼1.1 ppb per day), Zr ions are nonharmful and even exert bioactivity on bone-forming cells via activating BMP signaling. 64 Additionally, the releasing of cation ions from calcium silicate materials is causative of mild alkalization of local milieus (Figure 8c), 56 and this can promote ALP expression and ECM mineralization.…”

Comparative study of compressive and fatigue strength of dental implants made of nanocrystalline Ti Hard and microcrystalline Ti G4

“…As with other metals, the mechanical properties of Ti alloys can be improved through the use of mechanisms such as solid solution strengthening with interstitial and substitutional atoms, grain size refinement, particle precipitation, work hardening and dispersion strengthening. Onal et al proposed a multiscale modelling approach to predict the impact response of a biomedical Nb–Zr alloy by incorporating both geometric and microstructural aspects . They observed that composition and processing of metals and alloys may change their mechanical properties.…”

“…Onal et al proposed a multiscale modelling approach to predict the impact response of a biomedical Nb-Zr alloy by incorporating both geometric and microstructural aspects. 11 They observed that composition and processing of metals and alloys may change their mechanical properties. Annealed metal alloys, for instance, have better ductility than cold worked and cast materials, but, on the other hand, usually have lower tensile strength than cold worked ones.…”

Multi-Scale Modeling of the Impact Response of a Strain-Rate Sensitive High-Manganese Austenitic Steel

“…It is well known that very large deformations taking place within very short time periods constitute the major difficulty of FE simulations of impact loading (Kormi et al, 1997;Raykhere et al, 2010;Onal et al, 2014). Specifically, the available time period is insufficient for the stabilization of the computed displacements in the case of impact loading, such that the material's behavior significantly deviates under this dynamic type of loading from that under normal conditions owing to the non-linear behavior under dynamic loading (Onal et al, 2014).…”