Abstract
Attempts to improve the osteointegration, fixation and stability of Ti-base implants have been focused by producing a significative surface roughness that enhances the surface area available for bone/ implant apposition. In this research study, it shows the experimental data by synchrotron radiation X-ray diffraction (SR-XRD) of the main material surface properties (residual stress and cold work) that changed significantly during the application of different surface treatments such as grit blasting and laser shock peening in a biometallic Ti–6Al–4V alloy. The ratio of residual stress to cold work is primarily determined by the material and the specific surface treatment applied. In order to establish how they alter the recorded magnetic signatures and to validate that the residual stress and cold work effects govern the outcome of the magnetic measurements, we used a nondestructive magnetic method. It was displayed that the magnetic method provides the unique capability of nondestructively sensing the thermomechanical relaxation below the treated surface only calculating the normal and tangential magnetic intensities induced by thermocurrents using a fluxgate magnetometer.
Highlights
In this research analytical-experimental study, we present evidence that suggests that the proposed magnetic method can able to detect and quantitatively assess the weighted average of the residual stress and cold work within the shallow surface layer of two different surface treatments such as grit blasting and laser peening in a biometallic Ti6Al4V ELI alloy
Grit blasting produced the highest degree of cold work due to the high number of impacts
Magnetic flux density measurements were applied as an assessment technique to detect subtle material variations produced by the manufacturing process of grit blasting and laser peening in a medical Ti 6Al4V alloy
Summary
The thermoelectric effects, mainly described by thermoelectric voltage (which is called Seebeck coefficient), are sensitive to small variations in the kinetics of driving electrons near the surface of Fermi. The distributions of residual stresses (which are normally present in metals and alloys after cold working or deformation) are a mixture of traction and compression, with at least some degree of triaxiality. Under such conditions the changes in Fermi level are very difficult to evaluate on a simple basis. In this research analytical-experimental study, we present evidence that suggests that the proposed magnetic method can able to detect and quantitatively assess the weighted average of the residual stress and cold work within the shallow surface layer of two different surface treatments such as grit blasting and laser peening in a biometallic Ti6Al4V ELI alloy
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