Fatigue crack effect on magnetic flux leakage for A283 Gr.C steel

Table 1 Chemical composition (wt %) of A283 Gr.C steel

Table 2 Mechanical properties of A283 Gr.C steel steel

A microscopic image of a crack at an initial gap of a certain period. These images are enlarged to 25x, 10x and 1x size. 

Relationship between crack growth rate and magnetic flux leakage of MMM signal

Relationship between da/dN and HP(Y) in A283 GR.C steel tensile-tensile fatigue test. The crack growth rate da/dn is simultaneously increased. As the flux leaks to the metal surface, the R-squared value is between 0.7387 and 0.8863. It can also be clearly seen that this pattern S curve shows the same trend, in the shape of a sigmoid colon.

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