Nondestructive Magnetic Monitoring of Residual Stresses in a Medical Ti–6Al–4V–ELI Alloy Using a Fluxgate Sensor
Tóm tắt
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.
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