Methodology for the Stress Measurement of Ferromagnetic Materials by Using Magneto Acoustic Emission
Tóm tắt
Magneto acoustic emission (MAE) is a magnetic nondestructive testing (NDT) method that has been used in different fields for 30 years. MAE is a promising method for the early characterization of damage and the evaluation of the residual stress of ferromagnetic materials. However, this technique is still in its early stage and requires further development. The mechanism and influence factors of MAE are still under investigation. Quantitative NDT is difficult because of the lack of robust theoretical bases and models. In this study, we investigated the influence factors of MAE signals systematically and established a mathematical model to describe these influences. The special design of the specimen and the precise control of experimental conditions are the key points for obtaining reasonable experimental results and for developing the model. A methodology for stress assessment was developed on the basis of the proposed model and was verified by using the pure bending test. Results show that stresses within a measureable depth of 4 mm can be evaluated and that the maximum testing error is 30 %.
Tài liệu tham khảo
Guyot M, Cagan V (1993) The magneto-acoustic emission (invited). J Appl Phys 73(10):5348–5353
Kusanagi H, Kimura H, Sasaki H (1990) “Acoustic emission characteristics during magnetization of ferromagnetic materials”, [J]. Appl Phys 50–53
Augustyniak B, Sablik MJ, Landgraf FJG et al (2008) “Lack of magnetoacoustic emission in iron with 6.5 % silicon” [J]. Magn Magn Mater 320:2530–2533
Shibata M, Ono K (1981) Magneto mechanical acoustic emission—a new method for non-destructive stress measurement. NDT Int 14(5):227–234
Skalsky V, Hirnyj S, Pochapskyy Y et al. (2011) “The effect of deformation on the parameters of magnetoacoustic signals” [J]
Gorkunov ES, Dragoshanskii YN, Khamitov VA, Hevnin VM (2001) “Magnetoelastic acoustic emission in ferromagnetic materials. I. Effect of crystal anisotropy”. Russ J Nondestruct Test 37(3):163–180
John WW, Tian GY, Moorthy V, Shaw BA (2009) “Magneto-acoustic emission and magnetic barkhausen emission for case depth measurement in En36 gear steel”. EEE Trans Magn 45(1)
Ng DHL, Jakubovics JP, Scruby CB, BriggsGAD (1992) “Effect of biaxial stress on magnetoacoustic emission from Nikel”. IEEE Trans Magn 28(5)
Ng DHL (1993) “Measurement of stress in an elastically bent steel bar by magnetoacoustic emission”. IEEE Trans Magn 29(6):3028–3030
Ajay D, Atherton DL (1992) “Magnetizing frequency dependence of magneto-acoustic emission in pipeline steel”. IEEE Trans Magn 28(2):1003–1006
Wilson J, Tian GY (2006) “Pulsed magneto-acoustic emission sensor array for stress measurement and material characterization”. http://eprints.hud.ac.uk/3803/
Augustyniak B, Piotrowski L, Chmielewski M, Kowalewski Z (2012) “Comparative study with magnetic techniques of P91 and 13HMF steels properties subjected to fatigue tests”. J Electr Eng 63(7s):15–18
Buttle DJ, Scruby CB, Briggs GAD et al (1987) “The measurement of stress in steels of varying microstructure by magnetoacoustic and Barkhausen emission” [J]. Proc R Soc London Math Phys Scie 414(1847):469–497
Pochapskyy Y, Klym B, Hirnyj S et al. (2011) Instrumentation for magnetoacoustic emission diagnostics of ferromagnetic materials [J]
Ono K, Shibata M (1981) Magneto mechanical acoustic emission for residual stress and prior strain determination [J]. Magnetomechanical acoustic emission. Dunhart, Publishers, Anaheim, pp 154–174
Liu HS (2005) Theoretical and methodological and study of stress measurement based on magnetic anisotropy. [D] China University of Mining and Technology
Augustyniak M, Augustyniak B, Piotrowski L et al (2006) “Evaluation by means of magneto-acoustic emission and Barkhausen effect of time and space distribution of magnetic flux density in ferromagnetic plate magnetized by a C-core”. J Magn Magn Mater 304(2):552–554