Method for evaluating residual fatigue life of mechanical parts

Details Method for evaluating residual fatigue life of mechanical parts Method for evaluating residual fatigue life of mechanical parts

G - Physics

01

N

358/11.4

G01N 23/20 (2006.01)

Patent

CA 1244151

ABSTRACT OF THE DISCLOSURE A method for evaluating a residual fatigue life of mechanical parts, consisting of the steps of grinding by a minute amount a surface layer of a mechanical part to be inspected to form an inspection surface, measuring half-width data of an X-ray diffraction intensity curve on the inspection surface, calculating a depth (do) of a fatigue damaged region from a graph of a half-width ratio (H/Ho) versus a depth (d) below the surface layer, and determining a fraction of fatigue damage on the basis of data of the depth (do) of the damaged region versus the fraction of fatigue damage (D) which were separately obtained from a test piece.

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