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Calum
Calum
09:37 Mar-08-2018
Time of flight diffraction (TOFD), an advanced non-destructive testing technique for inspection of welds for heavy walled pressure vessels

I would like to point out that the equations for second, third and fourth arrival times are incorrect. The formulae state that the D, D+L and H value should be multiplied by four, but actually it should be both values once added that should be multiplied by 4. I.e. for the first equation the Dsquared and S squared should be in brackets so they are added, before finally being multiplied by 4.

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