Electromagnetic Testing - Eddy Current Testing Procedures

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Alternatively Charlie Chong/ Fion Zhang
The skin depth equation is strictly true only for infinitely thick material and planar magnetic fields. Using the standard depth δ , calculated from the above equation makes it a material/test parameter rather than a true measure of penetration. (1/e) (1/e) 2 (1/e) 3 FIG. 4.1. <strong>Eddy</strong> current distribution with depth in a thick plate and resultant phase lag. Charlie Chong/ Fion Zhang
Page 1 and 2: Electromagnetic Testing - Eddy Curr
Page 3 and 4: Charlie Chong/ Fion Zhang
Page 5 and 6: Eddy current signals- Calibration C
Page 7 and 8: Eddy current signals- Calibration S
Page 9 and 10: Eddy current signals- ID Pits Multi
Page 11 and 12: Eddy current signals- OD Pit Single
Page 13 and 14: Eddy current signals- OD Crack at S
Page 15 and 16: Eddy current signals- MIC damage si
Page 21 and 22: Greek letter Charlie Chong/ Fion Zh
Page 23 and 24: 4.1.1 Eddy current path Eddy curren
Page 25 and 26: Alternatively Charlie Chong/ Fion Z
Page 27 and 28: Standard Depth Calculation Where:
Page 29: Defect Detection / Electrical condu
Page 33 and 34: One should also note that the magne
Page 35 and 36: Phase lag is an important parameter
Page 37 and 38: Phase and current density change wi
Page 39 and 40: At one standard depth of penetratio
Page 41 and 42: Example: The phase lag calculated w
Page 43 and 44: 4.1.3 Zone of probe action Eddy cur
Page 45 and 46: 4.2. Influence of material temperat
Page 47 and 48: From Eq. (4.3) it can be seen that
Page 49 and 50: Unit for Electrical Conductivity Th
Page 51 and 52: Charlie Chong/ Fion Zhang http://ww
Page 53 and 54: Charlie Chong/ Fion Zhang http://ww
Page 55 and 56: To prevent errors from differences
Page 57 and 58: 4.2.3. Compensation The eddy curren
Page 59 and 60: Such signals can be difficult to an
Page 61 and 62: Keywords: • Test frequency is oft
Page 63 and 64: 4.3.2 Phase angle discrimination In
Page 65 and 66: The most common practice involving
Page 67 and 68: Band pass filters: use combinations
Page 69 and 70: FIG. 4.3. Effects of Filtering. (2/
Page 71 and 72: 4.3.4 Magnetic saturation Eddy curr
Page 73 and 74: Discuss on: Eddy current testing of
Page 75 and 76: 4.4 Coupling influence 4.4.1 Vibrat
Page 77 and 78: 4.4.3 Centering, fill factor η (Et
Page 79 and 80: 4.4.4 Sensitivity The distribution
Page 81 and 82:
The Response Frequency (F r ) is th
Page 83 and 84:
4.5.2 Frequency response of apparat
Page 85 and 86:
4.6.1 Function of reference samples
Page 87 and 88:
FIG. 4.5a illustrates eddy current
Page 89 and 90:
4.6.3 Fabrication and reproducibili
Page 91 and 92:
Reference samples Charlie Chong/ Fi
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Reference samples Charlie Chong/ Fi
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4.7. Inspection method 4.7.1 Range
Page 97 and 98:
4.7.3 Data analysis and interpretat
Page 99 and 100:
Level 2 An individual certified to
Page 101 and 102:
Introduction to Eddy Current Machin
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Electromagnetic Testing - Eddy Current Testing Procedures

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