Electromagnetic testing emt-mft chapter 9b

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PART 1. Magnetic Field Testing 1.0 Introduction MAGNETIC FIELD TESTING includes some of the older and more widely used methods for the nondestructive evaluation of materials. Historically, such methods have been in use for more than 50 years in the examination of magnetic materials for defects such as cracks, voids, or inclusions of foreign material. More recently, magnetic methods for assessing other material properties, such as grain size, texture, or hardness, have received increasing attention. Because of this diversion of applications, it is natural to divide the field of magnetic materials <strong>testing</strong> into two parts, one directed toward defect detection and characterization and the other aimed at material properties measurements. This article is primarily concerned with the first class of applications, namely, the detection, classification, and sizing of material flaws. However, an attempt has also been made to provide at least an introductory description of materials characterization principles, along with a few examples of applications. This is supplemented by references to other review articles. Charlie Chong/ Fion Zhang ASM Metal Handbook Vol.17 Nondestructive evaluation and Quality control
Keywords: Field of magnetic materials <strong>testing</strong> into two parts, • one directed toward defect detection and characterization and • the other aimed at material properties measurements. Charlie Chong/ Fion Zhang ASM Metal Handbook Vol.17 Nondestructive evaluation and Quality control
Page 1 and 2: Electromagnetic Testing MFLT/ ECT/
Page 3 and 4: Ship building Charlie Chong/ Fion Z
Page 5 and 6: Offshore Structures & Appurtenances
Page 13 and 14: Power Piping Charlie Chong/ Fion Zh
Page 15 and 16: Charlie Chong/ Fion Zhang
Page 17 and 18: Fion Zhang at Shanghai 2015 Februar
Page 19: Chapter 9B: Magnetic Field Testing
Page 23 and 24: Although it is conceivable that lea
Page 25 and 26: Barkhausen noise: Magnetization (J)
Page 27 and 28: Barkhausen noise A coil of wire wou
Page 29 and 30: A set-up for non-destructive testin
Page 31 and 32: Magnetic Dipole Charlie Chong/ Fion
Page 33 and 34: If a slot is cut in the rod, as ill
Page 35 and 36: 2.2 Experimental Techniques. One of
Page 37 and 38: It is possible to generate a magnet
Page 39 and 40: The flaw leakage field can be detec
Page 41 and 42: Fig. 3 Flux leakage measurement usi
Page 43 and 44: Unlike the inductive coil, which pr
Page 45 and 46: There are, however, many situations
Page 47 and 48: Fig. 5 Dependence of magnetic signa
Page 49 and 50: Fig. 6 Characterization of a ferrit
Page 51 and 52: PART 2. Principles of Magnetic Char
Page 53 and 54: Hysteresis Curves Charlie Chong/ Fi
Page 55 and 56: Nevertheless, the prospect of nonde
Page 57 and 58: Curie temperature Below T c Ferroma
Page 59 and 60: Paramagnetism The magnetic moments
Page 61 and 62: Antiferromagnetism The magnetic mom
Page 63 and 64: Fig. 7 Experimental arrangement for
Page 65 and 66: The review articles and conference
Page 67 and 68: Leakage field sensors are mounted b
Page 69 and 70: In addition to systems for inspecti
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The flux leakage method is also fin
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Another area in which the flux leak
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Finally, the flux leakage method ha
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Steel rebars and cables in a large
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Fig. 10 Effect of mechanical hardne
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Keywords: • For one alloy, AISI 4
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Offshore Structures Charlie Chong/
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VLCC Charlie Chong/ Fion Zhang
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Offshore Structures Charlie Chong/
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Pipeline & Piping Charlie Chong/ Fi
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Charlie Chong/ Fion Zhang
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Electromagnetic testing emt-mft chapter 9b

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