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Identification of scratch mechanisms on a retrieved metallic femoral head

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Academic year: 2021

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Figure

Fig. 1. Visualisation of (a) the retrieved UHMWPE acetabular liner with an embedded titanium fibermesh piece marked with a black arrow, (b) the retrieved 28 mm diameter titanium based femoral head and the lines drawn for the reference frame.
Fig. 2. Example of results showing: (a) a residual profile obtained by re- re-moving the form of an experimental profile by means of a best-fitting  sec-ond order polynomial curve, (b) the related autocorrelation function of the residual profile.
Fig. 3. Schematic representation of a bearing area curve as well as the related roughness parameters R k , Rpk, Rvk, Mr 1 , Mr 2 .
Fig. 5. Isometric plots of typical areas having: (a) a high brightness level, (b) an intermediate brightness level, (c) a low brightness level and large scratches with pile-up material to the sides, (d) a low brightness level and large scratches without an
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