UTILITY OF 45 DEGREE PROBING

45 degree probe

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Ultrasonics an Overview

Ultrasonics An Overview

PPT on STAR CRACK by 37 deg PROBE

Click Here STAR CRACK 37 PROBE

Second Critical Angle

Second critical angle :-An incident angle that makes the angle of refraction for the shear wave 90 degrees and at this point, all of the wave energy is reflected or refracted into a surface following shear wave.

2nd Critical Angle

First Critical Angle

It is an “angle of incidence” of L-Wave in first media for which refracted longitudinal wave becomes parallel to the surface (i.e Angle of Refraction is 90 deg)

1st Critical Angle

 

Minimum Flaw sizes detectable in Weld Testing :-

Minimum Flaw sizes detectable in Weld Testing :-
Velocity = Frequency x Wavelength(λ)
Wave length (λ) = V / f
Frequency(f) Wave Velocity(V)
mm/s
Wave length(λ)
in mm
Minimum Flaw size(λ/2)
in mm
0◦ 2 Mhz Longitudinal wave 5.92 x 106 2.96 1.48
70◦ 2 Mhz Shear wave 3.23 x 106 1.615 0.8075
45◦ 2 Mhz Shear wave 3.23 x 106 1.615 0.8075

#minimum-flaw-size

Minimum Flaw sizes detectable in Rail Testing

Minimum Flaw sizes detectable in Rail Testing :-
Velocity = Frequency x Wavelength(λ)
Wave length (λ) = V / f
Frequency(f) Wave Velocity(V)
mm/s
Wave length(λ)
in mm
Minimum Flaw size(λ/2)
in mm
0◦ 4 Mhz Longitudinal wave 5.92 x 106 1.48 0.74
70◦ 2 Mhz Shear wave 3.23 x 106 1.615 0.8075
45◦ 2 Mhz (SEJ) Shear wave 3.23 x 106 1.615 0.8075