Variation of the stress dependent magnetic flux leakage signal with defect depth and flux density

NDT and E International

Volumn 29, Issue 2, 1996, Pages 79-86

  Krause, Thomas W ^a   Donaldson, R M ^a   Barnes, R ^a   Atherton, David L ^a  

^a QUEEN S UNIVERSITY   (Canada)

Author keywords

Magnetic flux leakage; Stress concentration; Uniaxial stress

Indexed keywords

CALCULATIONS; DEFECTS; DENSITY (SPECIFIC GRAVITY); FINITE ELEMENT METHOD; MAGNETIC PROPERTIES; SPURIOUS SIGNAL NOISE; STEEL PIPE; STRESS CONCENTRATION;

BLIND HOLE DEFECTS; DEFECT DEPTH; DEFECT INDUCED STRESS CONCENTRATION; FLUX DENSITY; MAGNETIC FLUX LEAKAGE; UNIAXIAL STRESS;

MAGNETIC LEAKAGE;

EID: 0030121052     PISSN: 09638695     EISSN: None     Source Type: Journal    
DOI: 10.1016/0963-8695(95)00050-X     Document Type: Article

References (21)

1. Atherton, D. L. 'Magnetic inspection is key to ensuring safe pipelines', Oil Gas J 87 32 (1989) pp 52-61
2. Atherton, D. L. and Teitsma, A. 'Detection of anomalous stresses in gas pipelines by magnetometer survey' J Appl Phys 53 11 (1982) pp 8120-8135
3. Atherton, D. L., Dhar, A., Hauge, C. and Laursen, P. 'Effects of stress on magnetic flux leakage indications from pipeline inspection tools' Oil Gas J 90 27 (1992) pp 81-83
4. Laursen, P. and Atherton, D. L. 'Effects of line pressure stress on magnetic leakage flux patterns' Brit J Nondestr Testing 34, 6 (1992) pp 285-288
5. Barnes, R. and Atherton, D. L. 'Effect of bending stresses on magnetic flux leakage patterns' NDT & E Intern 26 1 (1993) pp 3-6
6. Barnes, R. 'Comparison of the effects of surface and uniform stresses on magnetic flux leakage signals' MSc Thesis, Queen's University, Kingston, 1993
7. Atherton, D. L. and Jiles, D. C. 'Effects of stress on the magnetisation of steel' IEEE Trans Magn MAG-19 5 (1983) pp 2021-2023
8. Jiles, D. C. and Atherton, D. L. 'Effects of stress on magnetization' NDT Intern 19 1 (1986) pp 15-19
9. Atherton, D. L. and Szpunar, J. A. 'Effect of stress on magnetization and magnetostriction in pipeline steel' IEEE Trans Magn MAG-22 5 (1986) pp 514-516
10. Atherton, D. L. and Sudersena Rao, T. 'Effect of order of stress and field application on the measured flux density in 1 % Mn pipeline steel' J Appl Phys 62 7 (1987) pp 2914-2917
11. Atherton, D. L., Sudersena Rao, T. S. and Schonbachler, M. 'Magnetization changes induced by stress under constant applied field in 2% Mn pipeline steel' IEEE Trans Magn 24 3 (1988) pp 2029-2032
12. Makar, J. M. and Atherton, D. L. 'Effects of stress on the reversible permeability of 2% Mn steels' CSNDT J 10 3 (1989) pp. 18-24
13. Makar, J. M. and Atherton, D. L. 'Effects of uniaxial stress on the reversible and irreversible permeabilities of 2% Mn pipeline steel' IEEE Trans Magn 30 4 (1994) pp 1380-1387
14. Guo, X. and Atherton, D. L. 'Magnetization changes in 2% Mn pipeline steel induced by uniaxial tensile stress cycles of increasing amplitude' IEEE Trans Magn 31 5 (1995) pp 2510-2521
15. Clapham, L., Krause, T. W., Olsen, H. Ma, B., Atherton, D. L. and Holden, T. M. 'The application of neutron diffraction to stress mapping around a blind-hole defect in stressed pipeline steel' J Strain Anal Eng Des 29 4 (1994) pp 317-323
16. Peterson, R. E. Stress Concentration Factors, John Wiley, New York (1974)
17. Sternberg, E. and Sadowsky, M. A. 'Three-dimensional solution for the stress concentration around a cylindrical hole in a semi-infinite elastic body', Trans ASME 88 E (1966), Applied Mechanics Section, p 855
18. Krause, T. W., Little, R. W., Barnes, R., Donaldson, R. M., Ma, B. and Atherton, D. L. 'Effect of stress concentration on magnetic flux leakage signals from blind-hole defects in stressed pipeline steel' Res Nondestr Eval submitted
19. Atherton, D. L. 'Finite element calculations and computer measurements of magnetic flux leakage detector signals' Brit J NDT (May 1988) pp 159-162
20. Atherton, D. L. and Daly, M. G. 'Finite element calculation of magnetic flux leakage detector signals' NDT Intern 20 4 (1987) pp 235-238
21. Clapham, L., Krause, T. W., Olsen, H., Ma, B., Atherton, D. L., Clark, P. and Holden, T. M. 'Characterization of texture and residual stess in a section of 610 mm pipeline steel' NDTE & E Intern 28 2 (1995) pp 73-82