Magnetic Perturbation Inspection of Inner Bearing Races |
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adjacent Amp mV Analysis angle apparent approximately arrow associated axial background ball basis bearing races calculate caused centerline circumferential CORRESPONDING DEFECT crack cycles damage DEFECT SIGNAL depth determine diameter discussed edge effect Endurance Testing etching evident examination example expanded expanded record failed failure fatigue field flaw FLUX Further in/cm inch inclusion indents indicates initial inner races inspection records interesting limits Lina material metallurgical mv/cm Note nucleating observed obtained occurred opposite polarity signals particles Peak Separation Photo photomicrograph plastic zone plastically deformed Polaroid possible precise predict present prior to endurance probe radial RECORDS WITH TYPICAL Reference region relative Remarks Report respect running scan tracks SCRIBE LINES sectioning Shift shown in Figure shows signal amplitude signal locations spall specific specimens stress subsurface Subsurface Inclusion sulfide surface Table trace track TYPICAL SIGNALS unetched void polarity signals